trigger: add trigger plugin
trigger: do not allow a name starting with "-"
trigger: add option "rename" in command /trigger
trigger: add more help in trigger options
trigger: minor change in output of /trigger for regex
trigger: display regex changes in monitor buffer
trigger: fix regex result in a hook print
trigger: enable many trigger names and value "-all" in command /trigger {enable|disable|toggle}
trigger: add support of variable in regex option

Examples with new format:
  /regex/text/
  /regex/text/var
  /regex1/text1/ /regex2/text2/
  /regex1/text1/var /regex2/text2/var
api: add function hashtable_dup
trigger: add hsignal
trigger: remove quotes around value in command /trigger set
trigger: execute callback even if regex/command are not set in the trigger
trigger: add timer
core: add argument "num_items" in function string_split_shell
api: add function string_split_shell
trigger: split arguments like shell in "/trigger add", to create a whole trigger with one command
trigger: sort triggers by name
trigger: add completion for all arguments of command /trigger add
trigger: remove the timer hook pointer during the last timer call