modulejail v1.4.3

modulejail v1.4.3

Bug-fix release for a man page lint warning. RHEL / Arch / Debian /
Ubuntu users get the same script; only the rendered man 8 modulejail
output is affected.

• Man page used the non-portable .URL macro (from the www.tmac
  groff extension, not loaded by default in Debian's groff pipeline).
  Replaced with the standard .UR / .UE pair from the man macro
  set. Catches the lintian warning Jérémy Lal saw during the Debian
  package build:

  W: modulejail: groff-message troff:<standard input>:569:
     warning: name 'URL' not defined (possibly missing space after 'UR')
     [usr/share/man/man8/modulejail.8.gz:1]
  

  Diagnosed and patch suggested by
  @kapouer in
  #23.

• New host-local test case manpage-no-groff-warnings.sh that
  renders man/modulejail.8.in with placeholder version/date,
  runs mandoc -T lint, and fails on any ERROR / WARNING /
  UNSUPP diagnostic. Catches this class of bug pre-tag, so future
  groff additions to the man page (e.g. another non-portable macro)
  block the release ceremony at step 0 rather than landing in a
  shipped tarball. Skips with exit code 77 (autoconf/TAP "skip")
  when mandoc is not on the host; macOS, Debian, Arch, and Rocky
  all ship it in their base or as a tiny dependency.