HomeSYNOPSIS
flag = handle:shutdown([how])
DESCRIPTION
This call causes all or part of a full-duplex connection to be shut down. If how is
"rd", receiving from the socket is shut down, if it is "wr", sending to the
socket is shut down and if it is "rdwr", the complete connection is shut down. The default is
"rdwr".
RETURN VALUE
On success, returns true. On failure, returns nil. In
case of an error, the error can be retrieved using rawio:lastError().
NOTES
While shutdown closes the connection, the socket handle continues to exists. To close the handle, call
rawio:close(), which also does an implied shutdown("rdwr").