Merge branch 'maint' into java-work * maint: news: update w.r.t. introduction of AM_DISTCHECK_CONFIGURE_FLAGS tests: optimize tests on primary/prefix mismatch for speed Warnings about primary/prefix mismatch fixed and extended. maintcheck: DISTCHECK_CONFIGURE_FLAGS can be defined on make cmdline distcheck: add support for AM_DISTCHECK_CONFIGURE_FLAGS docs: better documentation for silent make rules