Merge remote-tracking branch 'origin/maint'

Merge remote-tracking branch 'origin/maint'

* origin/maint:
  maint: remove useless file
  update files to ignore
  remove useless include
  use locale-indep. c_is* functions for parsing, not isspace, isprint etc
  gnulib: update
  --help: include a place to report translation issues
  tests: style changes
  tests: fix push-pull test
  yacc.c: style changes

Conflicts:
	src/system.h