hanemacs and hmconv had invalid version strings (fixed).
I also got replaced AMI_VER and HANIM_VER with PORTVERSION but I
didn't touch BROWSER_VER (in netscape ports) since it was used in too
many places.
dependencies to perl5 in -current. This might cause some unwanted
perl5 installations on -stable (if it was originally RUN_DEPENDS,
perl5 will now be installed during build too, etc.), but its lifetime
is limited anyway.