Use default autoconf extension, add some ignore files.

(This used to be commit a6fab66358)

docs/.bzrignore

@@ -0,0 +1,15 @@
+Makefile.settings
+Samba3-Developers-Guide-attributions.xml
+Samba3-HOWTO-attributions.xml
+Samba3-HOWTO.d
+Samba4-HOWTO.d
+Samba4-HOWTO-attributions.xml
+autom4te.cache
+config.log
+config.status
+configure
+test.d
+tmp
+smbdotconf/parameters.all.xml
+smbdotconf/parameters.global.xml
+smbdotconf/parameters.service.xml

docs/Makefile

@@ -26,7 +26,7 @@ Makefile.settings: configure
 	@echo Makefile.settings not present, trying to run configure...
 	./configure
 
-configure: configure.in
+configure: configure.ac
 	@echo configure not present, trying to regenerate it...
 	autoreconf
 endif