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.
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