Bring missing getsockopt(2) options: SO_LABEL SO_PEERLABEL SO_LISTENQLIMIT SO_LISTENQLEN SO_LISTENINCQLEN to the manual page.
Bring missing getsockopt(2) options: SO_LABEL SO_PEERLABEL SO_LISTENQLIMIT
SO_LISTENQLEN SO_LISTENINCQLEN to the manual page.

Till now those were only present in sys/socket.h file.

Reviewed by:	rwatson, gnn, keramida (with mdoc hat)

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