Make different Perl versions installable at the same time.

[mat]

Summary

This does a few things.

• Change the place Perl's section 1 man page are installed so that they don't conflict between versions, they get installed at the same place the section 3 man pages are, which seems sensible.
• Only the default Perl, that is, the one defined by DEFAULT_VERSIONS+=perl5=5.xx installs /usr/local/bin/perl.
• The non default Perl do install the usual scripts in /usr/local/bin, but they are installed with a version prefix.

[mat]

• Remove CONFLICTS_INSTALL.

[mat]

• Bump PORTREVISION.

[mat]

• Make it so it's a usable perl installation.

[mat]

• Make it so it's a usable perl installation.
• spam logs, don't wait if BATCH.
• rename MAN3PREFIX to PERLMANPREFIX.
• Move Perl's man1 files along with it's man3 files.

[mat]

• Remove -Dman1ext, no use any more.

[mat]

• Remove the perl5_version file, it is not useful any more.
• Add UPDATING.

[mat]

• Change the way Perl is depended on.

[bapt]

IMHO this is another step in the good direction (only checked the Mk magic)

[mat]

• Update the UPDATING instructions, say what must be done, no what should not.

[mat]

• Move where Perl installs it's modules man .1 pages.
• Fix all ports that have man1 pages and that are affected by the Perl change.

[mat]

• When I change the default Perl version, it'd be nice if it did not force

[mat]

• Fix when not running with PACKAGE_BUILDING.

[mat]

• Fix more ports.

[mat]

Rebase.