Update chat/weechat to 1.5

Main new features:
- add support of functions in API function "hook_process"
- move of nick coloring options from irc plugin to core
- move irc bar item "away" to core
- add pointer in callbacks used in scripting API
- add option irc.network.sasl_fail_unavailable
- add Portuguese translations

Bugs fixed:
- core: fix nick coloring when stop chars and a forced color are used: first
  remove chars then look for forced color
- core: check that pointers received in arguments are not NULL in buffers and
  windows functions
- core: fix truncation of buffer names in hotlist (issue #668)
- core: fix update of window title under Tmux (issue #685)
- core: fix detection of Python shared libraries (issue #676)
- api: fix number of arguments returned by function string_split() when
  keep_eol is 2 and the string ends with separators
- irc: fix first message displayed in raw buffer when the message is modified
  by a modifier (issue #719)
- irc: add missing completion "*" for target in command /msg
- irc: fix /msg command with multiple targets including "*"
- lua: fix crash when a lua function doesn窶冲 return a value and a string was
  expected (issue #718)
- relay: do not execute any command received in a PRIVMSG message from an irc
  relay client (issue #699)
- relay: fix the max number of clients connected on a port, allow value 0 for
  "no limit" (issue #669)
- relay: fix decoding of multiple frames in a single websocket message, send
  PONG on PING received in a websocket frame (issue #675)
- relay: fix command "input" received from clients with only spaces in content
  of message (weechat protocol) (issue #663)
- script: force refresh of scripts buffer after download of scripts list
- xfer: fix DCC file received when the terminal is resized


(tonio)