exiftool: restore as a separate port with perl variants

* add variants +perl5_26 +perl5_28
* add link to associated exiftool man page

perl/exiftool/Portfile

@@ -0,0 +1,45 @@
+# -*- coding: utf-8; mode: tcl; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- vim:fenc=utf-8:ft=tcl:et:sw=4:ts=4:sts=4
+
+PortSystem          1.0
+PortGroup           perl5 1.0
+
+
+name                exiftool
+
+perl5.branches      5.26 5.28
+
+perl5.require_variant   yes
+perl5.conflict_variants yes
+perl5.create_variants   ${perl5.branches}
+
+perl5.setup         Image-ExifTool 11.33
+revision            1
+
+license             {Artistic-1 GPL}
+maintainers         {devans @dbevans} openmaintainer
+platforms           darwin
+supported_archs     noarch
+
+description         General command line utility to read, write and edit EXIF metadata
+long_description    ${description}
+
+homepage            http://exiftool.sourceforge.net/
+
+distname
+distfiles
+
+depends_lib         port:p${perl5.major}-image-exiftool
+
+use_configure       no
+build               {}
+
+destroot {
+# this directory is required to keep portgroup perl5 happy even if nothing is installed in it
+# it will be removed at the end of destroot with other empty directories
+    xinstall -d ${destroot}/${prefix}/lib/perl5/vendor_perl/${perl5.major}
+    ln -s ${prefix}/libexec/perl${perl5.major}/exiftool ${destroot}${prefix}/bin/exiftool
+    ln -s ${prefix}/share/perl${perl5.major}/man/man1/exiftool.1pm ${destroot}${prefix}/share/man/man1/exiftool.1pm
+}
+
+livecheck.url       ${homepage}
+livecheck.regex     ${perl5.module}-(\[0-9.\]+)${extract.suffix}