doc: change style for listings in asciidoc CSS
doc: use listing style for commands in quickstart guide
Merge branch 'master' of git://git.sv.gnu.org/weechat
irc: fix prefix color for nick when the prefix is not in irc.color.nick_prefixes: use default color (key "*")

Problem was happening on a server which has "PREFIX=(Yqaohv)!~&@%+".
Users with prefix "!" were displayed as lightred (color for "~") instead of
lightblue (default key "*").

When a prefix was not found, WeeChat was looping on other prefixes (in
order). Now if color is not found, WeeChat uses immediately the fallback color.
irc: fix default completion (like nicks) in commands /msg, /notice, /query and /topic
Merge branch 'master' of git://git.sv.gnu.org/weechat
ruby: fix crash with Ruby 2.0: use one array for the last 6 arguments of function config_new_option (bug #31050)
Merge branch 'master' of git://git.sv.gnu.org/weechat
core: update WeeChat icon: move "ee" to the middle of icon
core: rename weechat_icon_32.png to weechat.png
core: install icon file (patch #7972)
core: rename icon file in Makefile.am
Merge branch 'master' of git://git.sv.gnu.org/weechat
ruby: fix typo in comment
irc: add option irc.look.display_join_message (task #10895)
doc: add note about constants in lua, fix lua example (scripting guide)
Revert "doc: add note about constants in lua, fix lua example (scripting guide)"

This reverts commit fad848bf7caff763ace7a8b88f06307feca77bac.
lua: remove use of functions for API constants
core: mention unit (minutes) for old option "irc.network.lag_disconnect"
script: fix compilation on GNU/Hurd (patch #7977) (thanks to Andrew Potter)

PATH_MAX is now defined in weechat-plugin.h (if not defined, for example on
GNU/Hurd), so that all plugins can use it.