Log message:
Remove dependency on devel/hs-mtl

mtl is now a part of GHC.

Log message:
Update to happy-1.19.12

1.19.12
* Fix for building with GHC 8.8.x
* Move custom Setup preprocessing steps into a separate executable,
  like Alex

1.19.11
* Fix for building with GHC 8.6.x

1.19.10
* Fix polymorphic (rank-n) non-terminals
* Fix for GHC 8.8.1

1.19.9
* Fix cabal warnings
* Bump upper bounds
* Fix build with GHC 8.4.1-alpha

1.19.8
* Fix issue #94 (some grammars don't compile due to new type
  signatures introduced to allow overloading to be used)

1.19.7
* Fix misisng test suite files in the sdist

1.19.6
* Manually generate Parser.hs using Makefile before sdist, to fix
  bootstrapping problems with cabal sandboxes & new-build
* Documentation fixes
* Fixed GLR support
* new option -p/--pretty prints the grammar rules (only) to a file
* Added generation of additional type signatures to enable use of
  typeclasses in monadic parsers.

Log message:
Add SHA512 digests for distfiles for devel category

Issues found with existing distfiles:
	distfiles/eclipse-sourceBuild-srcIncluded-3.0.1.zip
	distfiles/fortran-utils-1.1.tar.gz
	distfiles/ivykis-0.39.tar.gz
	distfiles/enum-1.11.tar.gz
	distfiles/pvs-3.2-libraries.tgz
	distfiles/pvs-3.2-linux.tgz
	distfiles/pvs-3.2-solaris.tgz
	distfiles/pvs-3.2-system.tgz
No changes made to these distinfo files.

Otherwise, existing SHA1 digests verified and found to be the same on
the machine holding the existing distfiles (morden).  All existing
SHA1 digests retained for now as an audit trail.

Log message:
Set BUILDLINK_DEPMETHOD.happy to "build" as happy is not a library but \ 
a build tool

Log message:
Import happy-1.19.5 as devel/happy,
packaged for wip by esg.

Happy is a parser generator for Haskell. Given a grammar specification in
BNF, Happy generates Haskell code to parse the grammar. Happy works in a
similar way to the yacc tool for C.