* tests/mktests.sh: Only skip internal macros starting with
	`_AC_' or `__AC_'.  Noted by Stepan Kasal.
	Update exclusion lists for the test suite to this end:
	(AC_ARG_VAR): Do test this now.
        (AC_REPLACE_FUNCS): This needs an argument.
	(AC_LINKER_OPTION): Remove (renamed to _AC_LINKER_OPTION).
	(AC_LIST_MEMBER_OF): Likewise (renamed to _AC_LIST_MEMBER_IF).
	(AC_LINK_FILES): Obsoleted since (and thus AU_DEFUN'ed).

Index: tests/mktests.sh
===================================================================
RCS file: /cvsroot/autoconf/autoconf/tests/mktests.sh,v
retrieving revision 1.50
diff -u -r1.50 mktests.sh
--- tests/mktests.sh	5 Apr 2006 20:55:14 -0000	1.50
+++ tests/mktests.sh	5 Apr 2006 21:35:09 -0000
@@ -82,14 +82,6 @@
 ac_exclude_list='
 	# Internal macros are used elsewhere.
-	/_AC_/ {next}
-
-	# Dunno why these are ignored.
-	/^AC_ARG_VAR$/ {next}
-	/^AC_LINKER_OPTION$/ {next}
-	/^AC_LINK_FILES$/ {next}
-	/^AC_LIST_MEMBER_OF$/ {next}
-	/^AC_REPLACE_FUNCS$/ {next}
-	/^AC_SEARCH_LIBS$/ {next}
+	/^_?_AC_/ {next}
 
 	# Used in many places.
 	/^AC_.*_IFELSE$/ {next}
@@ -99,6 +89,7 @@
 
 	# Need an argument.
 	/^AC_CANONICALIZE|AC_PREFIX_PROGRAM|AC_PREREQ$/ {next}
+	/^AC_SEARCH_LIBS|AC_REPLACE_FUNCS$/ {next}
 
 	# Performed in the semantics tests.
 	/^AC_CHECK_(ALIGNOF|DECL|FILE|FUNC|HEADER|LIB|MEMBER|PROG|SIZEOF|(TARGET_)?TOOL|TYPE)S?$/ {next}