This is the translation for the following description:
  - lxc.seccomp.notify.proxy (commit 8a643759)
  - host side veth device static routes (commit d4a7da46)
  - IPVLAN (commit c9f52382)
  - Layer 2 proxy mode (commit 6509154d)
  - gateway device route mode (commit a2f9a670)

and fix typo in English man page.
Signed-off-by: KATOH Yasufumi <karma@jazz.email.ne.jp>