fix spelling mistakes spotted by Debian's lintian

doc/ja/lxc-attach.sgml.in

@@ -415,7 +415,7 @@ by KATOH Yasufumi <karma at jazz.email.ne.jp>
       network/pid namespace context of the attached process. In order
       not to interfere with the host's actual filesystem, the mount
       namespace will be unshared (like <command>lxc-unshare</command>
-      does) before this is done, esentially giving the process a new
+      does) before this is done, essentially giving the process a new
       mount namespace, which is identical to the hosts's mount namespace
       except for the <replaceable>/proc</replaceable> and
       <replaceable>/sys</replaceable> filesystems.

doc/ja/lxc-info.sgml.in

@@ -86,7 +86,7 @@ by KATOH Yasufumi <karma at jazz.email.ne.jp>
           <para>
             <!--
             Print a configuration key from the container. This option
-            may be given mulitple times to print out multiple key = value pairs.
+            may be given multiple times to print out multiple key = value pairs.
             -->
             コンテナの設定値を表示します。このオプションは複数の key = value のペアを表示したい場合には複数回指定することも可能です。
           </para>

doc/lxc-attach.sgml.in

@@ -306,7 +306,7 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
       network/pid namespace context of the attached process. In order
       not to interfere with the host's actual filesystem, the mount
       namespace will be unshared (like <command>lxc-unshare</command>
-      does) before this is done, esentially giving the process a new
+      does) before this is done, essentially giving the process a new
       mount namespace, which is identical to the hosts's mount namespace
       except for the <replaceable>/proc</replaceable> and
       <replaceable>/sys</replaceable> filesystems.

doc/lxc-info.sgml.in

@@ -76,7 +76,7 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
         <listitem>
           <para>
             Print a configuration key from the container. This option
-            may be given mulitple times to print out multiple key = value pairs.
+            may be given multiple times to print out multiple key = value pairs.
           </para>
         </listitem>
       </varlistentry>