cleanup: Remove ports depending on expired lang/gcc6-aux

Keep ports-mgmt/synth and dependencies (including lang/gcc6-aux itself)
for now as synth is the only Ada port still maintained and might be
somewhat high-profile.

Removed ports:
archivers/zip-ada
cad/ghdl
databases/adabase
databases/apq
databases/apq-mysql
databases/apq-odbc
databases/apq-pgsql
devel/ada-util

*: fix tab vs. space issues, and comments according to the guide.

Remove # $FreeBSD$ from Makefiles.

Bump PORTREVISIONs of all users of math/mpc that we just updated to
version 1.1.0 (via revision 464079).

Return ports maintained by John Marino to the pool, he is no longer interested.

Submitted by:	Mark Millard via private e-mail

Return the ports mistakenly reset to ports@ in r433856 to John Marino.

The mistake was completely on my part, I somehow connected the dots the
wrong way in my head.

The only exceptions (for now) are archivers/zstd and ports-mgmt/synth
which were already picked up by new volunteers in the mean time.

Return ports maintained by John Marino to the pool, see r433827 for details

lang/adacontrol: Upgrade version 1.17r3 => 1.18r9

The big feature for adacontrol 1.18 is the direct support of .gpr project
files.  Unfortunately, the project support requires devel/gnatcoll, a heavy
dependency.  Thus, a PROJECT option was created which is "OFF" by default to
maintain the relatively lean dependency requirements.  If project support is
vital, reconfigure the build with the PROJECT option.

lang/asis: Upgrade version 2015 => 2016

Bump ports that depend on ASIS as well.

Change Ada Framework foundation from gcc5-aux to gcc6-aux

GCC 6.1 was released this week.  The Ada Framework in FreeBSD ports has
been based on GCC 5.3 GNAT although GCC 6.x has been supported for awhile
via the ADA_DEFAULT option in make.conf.

Now that GCC 6 has been officially released, switch to it by default.
People can maintain the old foundation by putting "ADA_DEFAULT=5" in
/etc/make.conf.

Libraries built by one GNAT are unusable by another, so almost every Ada
port has been bumped as a result.  Noticable exceptions are dns/ironsides
which fails to build on gcc6 (thus USES=ada:5 is set) and cad/ghdl which
needs additional testing as it may require gcc5 on FreeBSD (DragonFly
uses the LLVM backend only).

Remove ${PORTSDIR}/ from dependencies, categories h, i, j, k, and l.

With hat:	portmgr
Sponsored by:	Absolight

lang/adacontrol: distfile was re-rolled

The upstream distfile was changed.  Most of the changes were regenerated
documentation, but a build file (gpr) was also updated.  The changes are
legitimate (but should have been provided r4)

Introduce DIST_SUBDIR now that adacontrol joined the reroll club.

lang/adacontrol: Upgrade version 1.16r11 => 1.17r3

Typos, whitespace and capitalization fixes (G-P).

- Switch to options helpers
- While here, add some NO_ARCHes

Approved by:	portmgr blanket

Remove @dirrm from 10 of my lang ports

The majority of these ports had generated plists, not static ones.

lang/adacontrol: Upgrade version 1.16r10 => 1.16r11

lang/adacontrol: Upgrade version 1.15r5 => 1.16r10

Rule changes according to HISTORY file since version 1.15r5:

New rules:
----------
positional_associations (took over style (positional_association))
type_usage
unit_pattern
unsafe_elaboration

Changes to existing rules:
--------------------------
No_Operator_Usage:
  added observed relational

lang/adacontrol: Reaction to gcc-aux upgrade to gcc49

While the version remains the same, AdaControl comes with two flavors of
distfiles: "old" and "new".  The "old" distfile was appropriate for
gcc47-aux, but the "new" one is required for the gcc49-based ada compiler.
This change updates the distfile to be used to build adacontrol.

Tie libgnat_util.a to libasis

Rather than specify gnat_util every time ASIS is a dependency, set it
as a library dependency for ASIS.  LIB_DEPENDS doesn't work because it
is a static library, so just manually add libgnat_util.a to BUILD_DEPENDS
and RUN_DEPENDS, then adjust 3 ports accordingly.

lang/adacontrol: Define LICENSE (GPLv2 + GMGPL)

lang/adacontrol: Convert to staging

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

Add new port: lang/adacontrol

Adacontrol is a tool that analyzes language constructs in Ada programs.  It
can be used as a standalone tool, or integrated into other tools.  An
example of integration can be seen with the upcoming devel/ahven port.

Approved by:	bapt (mentor)