[Bug 258469] ports-mgmt/pkg_cutleaves: Improve regex for exclude file

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=258469

            Bug ID: 258469
           Summary: ports-mgmt/pkg_cutleaves: Improve regex for exclude
                    file
           Product: Ports & Packages
           Version: Latest
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: Individual Port(s)
          Assignee: bofh@freebsd.org
          Reporter: dereks@lifeofadishwasher.com
          Assignee: bofh@freebsd.org
             Flags: maintainer-feedback?(bofh@freebsd.org)

Related to bug 228226 it seem pkg_cutleaves will exclude anything that doesn't
match the following regex:

  /^(.+)-g?\d.*$/o

I believe this is trying to match portname-version.

The g was added to support github versioning gYYYYMMDD.  It appears there's a
number of other ports that have "interesting" versioning schemes.  ex:
universal-ctags: p5.9.20210815.0.   Changing the above regex to [gp] would fix
it at least for this package's scheme.  However, that leaves ~100 oddly
versioned packages left.


Looking at the output of:

   pkg rquery -r FreeBSD -a '%v %o' | grep -v "^[0-9g]"

You can see others that I would assume wouldn't be added to the exclude list.


Should the above regex allow at least the first couple characters after the -
to be non-digits? 

Is it possible for $leavestokeep array to use $name instead of $file?  If so
the regex wouldn't be required at all?

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