[Bug 218605] japanese/xdtp: Improve regex conformance

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=218605

            Bug ID: 218605
           Summary: japanese/xdtp: Improve regex conformance
           Product: Ports & Packages
           Version: Latest
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: Individual Port(s)
          Assignee: freebsd-ports-bugs at FreeBSD.org
          Reporter: bsdports at kyle-evans.net

Created attachment 181732
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=181732&action=edit
svn(1) diff of japnese/xdtp

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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