use cppcheck tools `cppcheck --enable=warning  .` on lxc source directory.

This patch fix the following warnning

```
[src/lxc/cgroups/cgfs.c:794]: (warning) %ld in format string (no. 3) requires 'long' but the argument type is 'unsigned long'.
[src/lxc/confile.c:4441]: (warning) %d in format string (no. 2) requires 'int' but the argument type is 'unsigned int'.
[src/lxc/confile.c:4502]: (warning) %d in format string (no. 2) requires 'int' but the argument type is 'unsigned int'.
[src/lxc/confile_legacy.c:921]: (warning) %d in format string (no. 2) requires 'int' but the argument type is 'unsigned int'.
[src/lxc/confile_legacy.c:938]: (warning) %d in format string (no. 2) requires 'int' but the argument type is 'unsigned int'.
[src/lxc/lxclock.c:63]: (warning) %zd in format string (no. 1) requires 'ssize_t' but the argument type is 'size_t {aka unsigned long}'.
[src/lxc/tools/lxc_info.c:118]: (warning) %u in format string (no. 1) requires 'unsigned int' but the argument type is 'signed int'.
[src/lxc/tools/lxc_info.c:118]: (warning) %u in format string (no. 2) requires 'unsigned int' but the argument type is 'signed int'.
[src/lxc/tools/lxc_info.c:123]: (warning) %u in format string (no. 1) requires 'unsigned int' but the argument type is 'signed int'.
[src/lxc/tools/lxc_info.c:127]: (warning) %u in format string (no. 1) requires 'unsigned int' but the argument type is 'signed int'.
[src/lxc/tools/lxc_info.c:130]: (warning) %u in format string (no. 1) requires 'unsigned int' but the argument type is 'signed int'.
[src/lxc/tools/lxc_top.c:212]: (warning) %u in format string (no. 1) requires 'unsigned int' but the argument type is 'signed int'.
[src/lxc/tools/lxc_top.c:212]: (warning) %u in format string (no. 2) requires 'unsigned int' but the argument type is 'signed int'.
[src/lxc/tools/lxc_top.c:217]: (warning) %u in format string (no. 1) requires 'unsigned int' but the argument type is 'signed int'.
[src/lxc/tools/lxc_top.c:221]: (warning) %u in format string (no. 1) requires 'unsigned int' but the argument type is 'signed int'.
[src/lxc/tools/lxc_top.c:224]: (warning) %u in format string (no. 1) requires 'unsigned int' but the argument type is 'signed int'.
```
Signed-off-by: Long Wang <w@laoqinren.net>

Added '--apt-conf' argument for ALTLinux template.

Added [-a|--apt-conf] parameter for selection of exact package
providing 'apt-conf'. By default 'apt-conf-sisyphus' is used for
Sisyphus and 'apt-conf-branch' for the rest of branches.
Signed-off-by: Denis Pynkin <denis.pynkin@collabora.com>

new configuration keys

start: send state to legacy lxc-monitord state server even if no state clients registered

This pr https://github.com/lxc/lxc/pull/1618 kill lxc-monitord, for backwards compatibility,
we also send state to legacy lxc-monitord state server in function `lxc_set_state`.

we should also send state if there is no state clients registered, otherwise `lxc-monitor` client will
not get state change event if container changed state to `STARTING` or `RUNNING`.
Signed-off-by: 0x0916 <w@laoqinren.net>

lxc-monitord: exit when got a quit command

lxc-monitor has an option to tell lxc-monitord to quit.

```
~/lxc (master) # lxc-monitor --help
lxc-monitor monitors the state of the NAME container

Options :
  -n, --name=NAME   NAME of the container
                    NAME may be a regular expression
  -Q, --quit        tell lxc-monitord to quit
```
But it does not work. This patch fix that.
Signed-off-by: 0x0916 <w@laoqinren.net>

the legacy keys will be kept around until LXC 3.0 and then will be
removed.
Signed-off-by: 0x0916 <w@laoqinren.net>

the legacy keys will be kept around until LXC 3.0 and then will be
removed
Signed-off-by: 0x0916 <w@laoqinren.net>

* rename lxc.haltsignal to lxc.signal.halt
* rename lxc.rebootsignal to lxc.signal.reboot
* rename lxc.stopsignal to lxc.signal.stop

the legacy keys will be kept around until LXC 3.0 and then will be
removed.
Signed-off-by: 0x0916 <w@laoqinren.net>

* rename lxc.logfile to lxc.log.file
* renaem lxc.loglevel to lxc.log.level
* rename lxc.syslog to lxc.log.syslog

the legacy keys will be kept around until LXC 3.0 and then will be
removed.
Signed-off-by: 0x0916 <w@laoqinren.net>

* rename lxc.init_cmd to lxc.init.cmd
* rename lxc.init_uid to lxc.init.uid
* rename lxc.init_gid to lxc.init.gid

the legacy keys will be kept around until LXC 3.0 and then will be
removed.
Signed-off-by: 0x0916 <w@laoqinren.net>

Signed-off-by: 0x0916 <w@laoqinren.net>

wipe all references lxc.network.{[i]}.* and replace with lxc.net.[i].*

`lxc_clear_nic` can not clear the nic, because it will not found
the right `netdev`.

testcase from get_item.c

```
313         if (!c->set_config_item(c, "lxc.network.hwaddr", "00:16:3e:xx:xx:xx")) {
314                 fprintf(stderr, "%d: failed to set network.hwaddr\n", __LINE__);
315                 goto out;
316         }
317         if (!c->set_config_item(c, "lxc.network.ipv4", "10.2.3.4")) {
318                 fprintf(stderr, "%d: failed to set ipv4\n", __LINE__);
319                 goto out;
320         }
321
322         ret = c->get_config_item(c, "lxc.network.0.ipv4", v2, 255);
323         if (ret <= 0) {
324                 fprintf(stderr, "%d: lxc.network.0.ipv4 returned %d\n", __LINE__, ret);
325                 goto out;
326         }
327         if (!c->clear_config_item(c, "lxc.network.0.ipv4")) {
328                 fprintf(stderr, "%d: failed clearing all ipv4 entries\n", __LINE__);
329                 goto out;
330         }
331         ret = c->get_config_item(c, "lxc.network.0.ipv4", v2, 255);
332         if (ret != 0) {
333                 fprintf(stderr, "%d: after clearing ipv4 entries get_item(lxc.network.0.ipv4 returned %d\n", __LINE__, ret);
334                 goto out;
335         }
```

line `327` will failed to clear nic, and line `333` give the error.
Signed-off-by: 0x0916 <w@laoqinren.net>

Signed-off-by: 0x0916 <w@laoqinren.net>

Signed-off-by: 0x0916 <w@laoqinren.net>

Signed-off-by: 0x0916 <w@laoqinren.net>

`lxc_config_net_hwaddr` return true if the config entry
is `lxc.network.hwaddr` or `lxc.net.[i].hwaddr`, `lxc.network.[i].hwaddr`
Signed-off-by: 0x0916 <w@laoqinren.net>

Signed-off-by: 0x0916 <w@laoqinren.net>

This patch wipe all references to lxc.network{[i]}.*
and replace with lxc.net.{[i]}.* in templates, documentation
and configuration files.
Signed-off-by: 0x0916 <w@laoqinren.net>

confile: free netdev->downscript

Signed-off-by: 0x0916 <w@laoqinren.net>

refactor confile code

Signed-off-by: 0x0916 <w@laoqinren.net>

confile: prepare for 2.1.

remove the `__func__` macro

API doc: update note for get_config_item

Our logging function will always spew out the function name.
Signed-off-by: 0x0916 <w@laoqinren.net>

Fix issue: https://github.com/lxc/lxc/issues/505Signed-off-by: 0x0916 <w@laoqinren.net>

default to CentOS 7

templates/debian: add aarch64 → arm64 mapping

use altarch mirror for CentOS on arches other than i386 and x86_64

CentOS only has i386 and x86_64 listed in mirrorlist.centos.org,
use http://mirror.centos.org/altarch/ for all other arches instead

See: https://bugs.centos.org/view.php?id=11250Signed-off-by: Evgeni Golov <evgeni@debian.org>

Signed-off-by: Evgeni Golov <evgeni@debian.org>

uname -m reports aarch64, but Debian calls the arch arm64
Signed-off-by: Evgeni Golov <evgeni@debian.org>

Use strerror(errno) instead of %m 

update .gitignore

Signed-off-by: 0x0916 <w@laoqinren.net>