FS-8195 Compatibility with Solaris 11 process privileges

Now the daemon manages its privileges correctly, so that -rp, -u,
-g and -lp can be supported, also in a Solaris zone.

Also fixed a problem that switch_log_printf() was used before the
logger was initialized, so the messages were sent to nowhere.

src/include/switch_core.h

@@ -2243,6 +2243,12 @@ SWITCH_DECLARE(switch_core_flag_t) switch_core_flags(void);
 */
 SWITCH_DECLARE(switch_status_t) switch_core_management_exec(char *relative_oid, switch_management_action_t action, char *data, switch_size_t datalen);
 
+/*! 
+  \brief Switch on the privilege awareness for the process and request required privileges
+  \return 0 on success
+*/
+								
+SWITCH_DECLARE(int32_t) switch_core_set_process_privileges(void);
 
 /*! 
   \brief Set the maximum priority the process can obtain