Merge branch 'maint'

Merge branch 'maint'

* origin/maint:
  maint: post-release administrivia
  version 2.6.2
  NEWS: update.
  yacc: remove trailing end of line at end of file
  thanks: fix a contributor name
  gnulib: update
  tests: synch line -> syncline, for consistency
  tests: synclines: style changes
  tests: synclines: fix perl invocation
  regen
  c++: trailing end-of-lines in %parse-param
  tests: simplify

Conflicts:
	cfg.mk
	data/glr.cc
	data/yacc.c
	src/parse-gram.c
	src/parse-gram.h
	src/parse-gram.y