Add some MSG_NOSIGNAL support for OSX

Signed-off-by: Rick Taylor <rick@tropicalstormsoftware.com>
Add string to SID conversion helpers

Signed-off-by: Rick Taylor <rick@tropicalstormsoftware.com>
Add Delegate3 to CDRIO

Signed-off-by: Rick Taylor <rick@tropicalstormsoftware.com>