Remove expired ports:
2019-01-08 databases/postgresql93-client: PostgreSQL-9.3 has reached end-of-life
2019-01-08 databases/postgresql93-docs: PostgreSQL-9.3 has reached end-of-life
2019-01-08 databases/postgresql93-contrib: PostgreSQL-9.3 has reached
end-of-life
2019-01-08 databases/postgresql93-pltcl: PostgreSQL-9.3 has reached end-of-life
databases/postgresql93-pgtcl: part of expired PostgreSQL 9.3
2019-01-08 databases/postgresql93-plperl: PostgreSQL-9.3 has reached end-of-life
2019-01-08 databases/postgresql93-plpython: PostgreSQL-9.3 has reached
end-of-life
2019-01-08 databases/postgresql93-server: PostgreSQL-9.3 has reached end-of-life

Bump PORTREVISION for ports depending on the canonical version of GCC
defined via Mk/bsd.default-versions.mk which has moved from GCC 7.4 t
GCC 8.2 under most circumstances.

This includes ports
 - with USE_GCC=yes or USE_GCC=any,
 - with USES=fortran,
 - using Mk/bsd.octave.mk which in turn features USES=fortran, and
 - with USES=compiler specifying openmp, nestedfct, c11, c++0x, c++11-lang,
   c++11-lib, c++14-lang, c++17-lang, or gcc-c++11-lib
plus, as a double check, everything INDEX-11 showed depending on lang/gcc7.

PR:		231590

Chase USES=pgsql in pgtcl slaves

Add NO_STAGE all over the place in preparation for the staging support (cat:
databases)

Add postgresql 9.3 beta1

Prepare for postgresql 9.3 beta 1 by svn cp postgresql92-* postgresql93-*