weechat: update to 1.9.1

Fixes CVE-2017-14727, CVE-2017-8073

version 1.9.1:
a crash can happen in logger plugin when converting date/time specifiers in file mask.
Two other bugs are fixed as well in buflist and relay plugins.

version 1.9:
- improve speed of nicklist bar item callback
- add auto scroll of buflist bar with new option buflist.look.auto_scroll
- add option buflist.format.name
- add variables ${format_name}, ${current_buffer} and ${merged} in buflist
- display a warning in buflist when the script buffers.pl is loaded
- add server/channel pointers in trigger IRC callbacks
- add API functions config_option_get_string and hdata_compare
- fix bind of Space key

version 1.8:
- add option weechat.completion.nick_case_sensitive
- add wilcard matching operator, cut of string and ternary operator in evaluation of expressions
- add resize of window parents with /window resize [h/v]size
- add plugin "buflist" (bar with list of buffers)
- add arraylist and dynamic string functions in API
- add option "open" in command /server
- add signal "irc_server_lag_changed" and store the lag in the server buffer (local variable)
- add aspell options to control delimiters in suggestions
- add option "-include" in commands /allchan, /allpv and /allserv

For a complete changelog, see:
https://weechat.org/files/changelog/ChangeLog-1.9.1.html


(maya)