3cc38e4780
Allow selection of base MIT on FreeBSD 15+. Improve port: - Replace PORTVERSION with DISTVERSION. - Merge CONFIGURE_ARGS and repalce "+=" with "=" - unnecessary. - Remove "+" in "PLIST_SUB+=" - unnecessary. - Fix warnings from portclippy. - Merge MKDIRs in do-install. PR: 292474 Co-authored-by: Vladimir Druzenko <vvd@FreeBSD.org>