(lib-src): Depend on src/config.h (e.g. for movemail.o).

(src/config.h): New target to re-configure if src/config.in is patched.

Makefile.in

@@ -220,7 +220,7 @@ paths-force: FRC
 
 src:	lib-src FRC
 
-lib-src: FRC
+lib-src: FRC src/config.h
 
 .RECURSIVE: ${SUBDIR}
 
@@ -239,6 +239,9 @@ Makefile: Makefile.in config.status
 src/Makefile: src/Makefile.in config.status
 	./config.status
 
+src/config.h: src/config.in config.status
+	./config.status
+
 lib-src/Makefile: lib-src/Makefile.in config.status
 	./config.status