- remove all STFS related stuff

- remove all STFS related stuff
  (which were already removed in revision 1.37 and
   readded by mistake in revision 1.39)

- change the SMB_MODULE() macro a bit
  Now we have:

dnl Specify the default build method of this module
dnl SMB_MODULE_DEFAULT(name,default_build)
AC_DEFUN(SMB_MODULE_DEFAULT,...

dnl Mark specified module as shared
dnl SMB_MODULE(name,default_build,static_files,shared_files,subsystem,whatif-static,whatif-shared,whatif-not)

  this let us specify the default build method inside of the included config.m4
  files

metze