devel/bglibs: perl is a run dependency only
- Set perl only as a run dependency 
- Trim Makefile header
- USES new perl5 framework
- NOPORTDOCS -> PORT_OPTIONS:MDOCS
Submitted by: Uffe Jakobsen <uffe uffe.org>
Approved by: maintainer (timeout)
- Unbreak: the self-tests included with bglibs contains several
network related tests (namely, in net/connect4.c and net/tcp4.c)
that fails in our package build cluster environment.
Thus, disable running self-tests during build process - create
a separate "selftest" Makefile target that would allow users
to run self-tests manually with "make selftest"
- Add USE_LDCONFIG
Nagged by: pointyhat via kris
Discussed with: oliver