Merge AddService(), AddClone() into AddLocalUser()

Merge AddService(), AddClone() into AddLocalUser()

src/chanserv.c (init_chanserv): Convert AddService() call to AddLocalUser().

src/global.c (init_global): Likewise.

src/mod-helpserv.c (register_helpserv): Likewise.

src/modcmd.c (cmd_service_add): Likewise.
  (modcmd_load_bots): Likewise.

src/nickserv.c (regex.h): Fall back to rxposix.h from local rx package.
  (init_nickserv): Convert AddService() call to AddLocalUser().

src/opserv.c (opserv_add_reserve): Convert AddClone() call to AddLocalUser().
  (cmd_clone): Likewise.
  (add_reserved): Likewise.
  (init_opserv): Convert AddService() call to AddLocalUser().

src/proto-bahamut.c (AddService): Convert into AddLocalUser().
  (AddClone): Delete.

src/proto-p10.c (AddService): Convert into AddLocalUser().
  (AddClone): Delete.

src/proto.h (AddService): Convert into AddLocalUser().
  (AddClone): Delete.
git-archimport-id: srvx@srvx.net--2006/srvx--devo--1.3--patch-35