r8273: fixed some memory leaks in smbscript. This required converting

r8273: fixed some memory leaks in smbscript. This required converting
file_load() to use talloc, which impacted quite a few bits of code,
including our smb.conf processing.

took the opportunity to remove the gloabls in params.c while doing this
(This used to be commit b220756cb4f1d201ba3e771ca67e4bfae5eae748)