r4825: Printing changes
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* bracket the add/delete/set printer scripts with checks for se_print_op
* slight change to the add/set printer script semantics. smbd no longer
relies on output from the script (on stdout) to re-read smb.conf
* remove SIGHUP from set/add/delete printin script code and now just
use MSG_SMB_CONF_UPDATED
* bracket the add/delete/set share scripts with checks for se_print_op
(this includes setting share ACLs)
(This used to be commit
8ab8113d2e1bec6a1dbf464882ad724c7c591be4)