doc: update japanese translations and docs
Merge branch 'master' of git://git.sv.gnu.org/weechat

Conflicts:
	po/ja.po
fix new line
doc: update japanese docs
doc: use github repository for script msgcheck.py in developer's guide
doc: add note about double tab in function weechat_printf, to display message without time/alignment (plugin API reference)
Merge branch 'master' of git://git.sv.gnu.org/weechat
core: fix help of option weechat.color.separator
core: fix compilation on OpenBSD (bug #38022)

File "sys/uio.h" needs to be included explicitly for use of "struct iovec" on OpenBSD.

Signed-off-by: Simon Kuhnle <simon@blarzwurst.de>
aspell: ignore self and remote nicks in private buffers
core: add buffer pointer in arguments for signals "input_search", "input_text_changed" and "input_text_cursor_moved"
doc: update signals arguments in plugin API reference
Merge branch 'master' of git://git.sv.gnu.org/weechat

Conflicts:
	po/ja.po
translation: update