maint: use short form bug URLs

maint: use short form bug URLs

* cfg.mk (sc_prohibit-long-form-bug-urls): Disallow long form in code.
* scripts/git-hooks/commit-msg: Disallow long form in commit messages.
* NEWS: Shorten long urls.
* bootstrap.conf: Likewise.
* configure.ac: Likewise.
* scripts/git-hooks/commit-msg: Likewise.
* src/csplit.c: Likewise.
* src/fmt.c: Likewise.
* src/make-prime-list.c: Likewise.
* src/nohup.c: Likewise.
* tests/od/od-float.sh: Likewise.
* tests/rm/r-root.sh: Likewise.
* tests/tail/inotify-race.sh: Likewise.
* tests/tail/inotify-race2.sh: Likewise.