converters/hs-dhall-json 1.7.12_2

converters/hs-dhall-json: remove stale patch

os-string was updated to 2.0.11 in 45647b6c8b71, which already
contains the big-endian fix, so the patch no longer applies.

converters/hs-dhall-json: fix build on powerpc64

os-string 2.0.2 has the wrong byteSwap16# type in its big-endian branch;
take the one-line fix from 2.0.2.2.

converters/hs-dhall-json: Improve port

* Add WWW for Hackage
* Add LICENSE_FILE

Approved by:		haskell@ (alven@)

Haskell ports: Switch some to GHC 9.6

converters/hs-dhall-json: Switch to GHC 9.6

PR:		278207

converters/hs-dhall-json: Update to 1.7.12

Uses/cabal.mk: Rework MASTER_SITES and DISTFILES handling.

This change removes duplicated entries from MASTER_SITES and DISTFILES
variables. Now the MASTER_SITES variable will contain single Hackage URL without
any group for the simplest case and with :_cabal_mk_hackage group in nodefault
case.

This change opens a path to using non-Hackage Cabal repositories
(needed for Cardano) and pulling in .cabal revisions without using patches.

Unfortunately, this change results in a large churn in Haskell ports distinfos.
To make this churn less useless, refresh all Haskell dependencies in all ports.

Remove WWW entries moved into port Makefiles

Commit b7f05445c00f has added WWW entries to port Makefiles based on
WWW: lines in pkg-descr files.

This commit removes the WWW: lines of moved-over URLs from these
pkg-descr files.

Approved by:		portmgr (tcberner)

Add WWW entries to port Makefiles

It has been common practice to have one or more URLs at the end of the
ports' pkg-descr files, one per line and prefixed with "WWW:". These
URLs should point at a project website or other relevant resources.

Access to these URLs required processing of the pkg-descr files, and
they have often become stale over time. If more than one such URL was
present in a pkg-descr file, only the first one was tarnsfered into
the port INDEX, but for many ports only the last line did contain the
port specific URL to further information.

There have been several proposals to make a project URL available as
a macro in the ports' Makefiles, over time.

This commit implements such a proposal and moves one of the WWW: entries
of each pkg-descr file into the respective port's Makefile. A heuristic
attempts to identify the most relevant URL in case there is more than
one WWW: entry in some pkg-descr file. URLs that are not moved into the
Makefile are prefixed with "See also:" instead of "WWW:" in the pkg-descr
files in order to preserve them.

There are 1256 ports that had no WWW: entries in pkg-descr files. These
ports will not be touched in this commit.

The portlint port has been adjusted to expect a WWW entry in each port
Makefile, and to flag any remaining "WWW:" lines in pkg-descr files as
deprecated.

Approved by:		portmgr (tcberner)

Uses/cabal.mk: Rename `EXECUTABLES` to `CABAL_EXECUTABLES`.

Approved by: tcberner

Differential Revision: https://reviews.freebsd.org/D36079

converters/hs-dhall-json: + A converter from Dhall to JSON.

PR:		251111
Reviewed by:	arrowd