Updates!

Updates!

- Don't print an uninitialised buffer in service.c
- Change some charcnv.c functions to take smb_ucs2_t ** instead of void **
- Update NTLMv2 code to use dynamic buffers
- Update experimental SMB signing code - still more work to do
- Move sys_getgrouplist() to SAFE_FREE() and do a DEBUG() on initgroups()
  failure.

Andrew Bartlett
(This used to be commit de1964f7fa855022258a84556b266100b917444b)