/commits.php is going away

• 439336 Tools/scripts/bump_revision.pl
• 439336 Tools/scripts/chkversion.pl
• 439336 Tools/scripts/distinfochecker
• 439336 Tools/scripts/mark_safe.pl

Fix shebang. If /usr/bin/env is used the -w flag can't be passed after perl.
Use 'use warnings;' instead.

While here remove distinfochecker. It's not needed anymore as it was written
for a simple purpose eleven years ago.

• 358817 Tools/scripts/bump_revision.pl
• 358817 Tools/scripts/chkversion.pl
• 358817 Tools/scripts/consistency-check
• 358817 Tools/scripts/distinfochecker
• 358817 Tools/scripts/getpr
• 358817 Tools/scripts/mark_safe.pl
• 358817 Tools/scripts/portsearch

Invoke perl with /usr/bin/env, as perl is not guaranteed to exist in
/usr/bin.

• 1.2 Tools/scripts/distinfochecker

Warn if there are duplicate MD5/SHA256/SIZE statements for a single file

• 1.1 Tools/scripts/distinfochecker

Small tool to check the necessary lines in the distinfo files, based
on the contents of the distinfo files.

#
# Small tool to find distinfo with missing MD5/SHA256/SIZE statements,
# based on the assumption that if there is one of the MD5/SHA256/SIZE
# statements, then there should be all of them (except for SIZE
# when MD5/SHA256 is set to IGNORE).
#
# Usage: distinfochecker [-v] [-d directory]
# -v    - verbose (print)
# -d    - use directory instead of /usr/ports
#