Remove some overusage of PERL_ARCH.

Sponsored by:	Absolight
Add an option to build with ssh from security/openssh-portable instead of base ssh.

PR:		193754
Submitted by:	chrysalis chrysalisnet org
Sponsored by:	Absolight
And one day, poudriere testport -c will work.

Sponsored by:	Absolight
Remove a bit of dead code.

Sponsored by:	Absolight
- Update to 1.76
- Update to 2.002
The IRC configure script has curious logic, is being overly complex,
and actually breaks badly if the port is being built in a chroot
where the host triplet won't match the jail triplet.

The solution I've provided here is clean.  Using the pre-configure
target, the build directory (with a fixed name) is created and the
needed configure script and header are copied over, just like the top
configure script does.  Then the port makefile just configures with
that.  It's much better, more robust, and fixes the triplet mismatch.

PR:		194679
Submitted by:	marino
devel/pecl-pthreads: update 2.0.7 -> 2.0.10

PR:		194157
Submitted by:	John Chen <johnpupu@gmail.com>
Approved by:	mentors (implicit)