actually, <ac/strings.h> rather goes into rewrite-int.h

libraries/librewrite/config.c

libraries/librewrite/context.c

libraries/librewrite/info.c

libraries/librewrite/ldapmap.c

libraries/librewrite/map.c

libraries/librewrite/params.c

libraries/librewrite/rewrite-int.h

libraries/librewrite/rewrite.c

libraries/librewrite/rule.c

libraries/librewrite/session.c

libraries/librewrite/var.c