Make AX_CONFIG_DIR_IMPLY AC_DISABLE_OPTION_CHECKING
Make AX_CONFIG_DIR_IMPLY AC_DISABLE_OPTION_CHECKING

Turn of warnings about unknown options as this also causes warnings about
options from submodules. AC_CONFIG_SUBDIRS has the same behaviour

jku/telepathy-gabble,Ziemin/telepathy-gabble,jku/telepathy-gabble,Ziemin/telepathy-gabble,mlundblad/telepathy-gabble,Ziemin/telepathy-gabble,Ziemin/telepathy-gabble,mlundblad/telepathy-gabble,mlundblad/telepathy-gabble,jku/telepathy-gabble