[Bug 218603] irc/irssi-xmpp: Improve regex conformance

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=218603

            Bug ID: 218603
           Summary: irc/irssi-xmpp: Improve regex conformance
           Product: Ports & Packages
           Version: Latest
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: Individual Port(s)
          Assignee: jadawin at FreeBSD.org
          Reporter: bsdports at kyle-evans.net
             Flags: maintainer-feedback?(jadawin at FreeBSD.org)
          Assignee: jadawin at FreeBSD.org

Created attachment 181730
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=181730&action=edit
svn(1) diff of irc/irssi-xmpp

In EREs, left-brace is not to be interpreted as an ordinary character unless
escaped. Using left-brace not as a part of a valid interval expression produces
undefined results [1].

There is a patch-in-progress to fix our implementation to throw an error if
left-brace is not used in a valid manner, it would be good to go ahead and
address this before-hand. =)

[1]
http://pubs.opengroup.org/onlinepubs/009696899/basedefs/xbd_chap09.html#tag_09_04_03

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