* automake.in (handle_aclocal_m4): Use new MAINTAINER_MODE conditional. (handle_configure): Likewise. (read_am_file): Likewise. (file_contents_with_transform): Likewise. (scan_one_configure_file): Recognize that AM_MAINTAINER_MODE defines a conditional. * automake.texi (Optional): Document new AM_MAINTAINER_MODE. * texi-vers.am ($(srcdir)/@VTEXI@): Look at MAINTAINER_MODE conditional. (maintainer-clean-@VTI@): Likewise. * remake.am ($(srcdir)/configure): Look at MAINTAINER_MODE conditional. * remake-hdr.am ($(srcdir)/@CONFIG_HEADER_IN@): Look at MAINTAINER_MODE conditional. * m4/maintainer.m4 (AM_MAINTAINER_MODE): Defined MAINTAINER_MODE conditional.