Log message:
textproc: Remove SHA1 hashes for distfiles

Log message:
*: Bump PKGREVISION for ghc-9.0.1

Log message:
Fix build with GHC 9

Log message:
(*/hs-*) BUILDLINK_API_DEPENDS.ghc <8.10, again

Log message:
(*/hs-*) fix build, not adapted to ghc90 version

Log message:
hs-*: add PLIST files

These PLIST files have been autogenerated by mk/haskell.mk using
HS_UPDATE_PLIST=yes during a bulk build.  They will help to track changes
to the packages.  The Haskell packages didn't have PLIST files because
their paths contained package hashes.  These hashes are now determined by
mk/haskell.mk, which makes it easy to generate easy to read PLIST files.

Log message:
Import HsYAML-0.2.1.0

HsYAML is a YAML 1.2 processor, i.e. a library for parsing and
serializing YAML documents.

Features of HsYAML include:
* Pure Haskell implementation with small dependency footprint and
  emphasis on strict compliance with the YAML 1.2 specification.
* Direct decoding to native Haskell types via (aeson-inspired)
  typeclass-based API (see Data.YAML).
* Allows round-tripping while preserving ordering, anchors, and
  comments at Event-level.
* Support for constructing custom YAML node graph representation
  (including support for cyclic YAML data structures).
* Support for the standard (untyped) Failsafe, (strict) JSON, and
  (flexible) Core "schemas" providing implicit typing rules as defined
  in the YAML 1.2 specification (including support for user-defined
  custom schemas; see Data.YAML.Schema).
* Support for emitting YAML using Failsafe, (strict) JSON, and
  (flexible) Core "schemas" (including support for user-defined custom
  encoding schemas; see Data.YAML.Schema).
* Event-based API resembling LibYAML's Event-based API (see
  Data.YAML.Event).
* Low-level API access to lexical token-based scanner (see
  Data.YAML.Token).