Update to 2.19.0.

• Do not be overly critical of macros which are used before declaration in DEPENDS
• Do not treat comments to ONLY_FOR_ARCHS and NOT_FOR_ARCHS as sortable data [1]
• Check for PORTSDIR defined in /etc/make.conf [2]
• Do not warn about ${DISTNAME}${EXTRACT_SFX} in DISTFILES if USE_GITHUB=nodefault [3]
• Thoroughly check for an OPTION description [4]
• Specify flag equivalency for -A in portlint(1) [5]

PR: 246346 [1]

		244807 [2]
		244741 [3]
		244480 [4]
		245338 [5]

Submitted by: 0mp [3]

		kevans [5]