MFH: r547547

converters/recode: fix info file, add LICENCE, quiet portlint/portclippy

This has been broken for almost 10 months, and again 3 months of silence
from the maintainer, so let me step in to just fix it for the nonce.

• Add LICENSE=GPLv2+
• Add USES=makeinfo to fix .info file in clean-room builds (poudriere) [1]
• Reshuffle a few lines to please portclippy and portlint
• Bump PORTREVISION to flush out the broken packages and force rebuild

• Add DISABLED example to strip library in order to also please stage-qa with DEVELOPER=yes (would require maintainer approval), in post-install (just remove @: and the comment line to enable).

PR: 241879 [1]
Submitted by: Victor Sudakov <vas@sibptus.ru> [1]
Approved by: portmgr@ (blanket, see next line)
Approved by: ports-secteam@ (blanket: add dependency to fix broken .info, add LICENSE, fix portlint/portclippy issues)