@var{flags}: zero or @code{GNUTLS_ALPN_} *
This function is to be used by both clients and servers, to declare
-the supported ALPN protocols, which are used during peer negotiation.
+the supported ALPN protocols, which are used during negotiation with peer.
If @code{GNUTLS_ALPN_MAND} is specified the connection will be aborted
if no matching ALPN protocol is found.
@strong{Returns:} On success, @code{GNUTLS_E_SUCCESS} (0) is returned,
otherwise a negative error code is returned.
-Since 3.1.11
+Since 3.2.0
@end deftypefun