doc: Add a specific date to manpage
doc: Add a specific date to manpage

This makes builds for socket wrapper reproducible.

Signed-off-by: Jelmer Vernooij <9648816b5a0c45426c88e14104568baf9283dd28@samba.org>
Reviewed-by: Andreas Schneider <5be00ddc76278cf6077f5047ca3384a88460c671@samba.org>

anoopcs9/socket_wrapper,anoopcs9/socket_wrapper