URLs in the PR field of commit logs

[Eric van Gyzen]

(I apologize for the massive cross-post.  There was no obvious place to
announce this.)

I plan to change the Subversion commit hooks to accept URLs in the PR
field of commit logs.  See

	https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=236229

If you anticipate specific problems this might cause, or have any other
relevant discussion, please comment on that bug.

Thanks,

Eric