Allow limiting RSA Key size also for server

Thanks to Harry Sintonen from WithSecure for pointing this out.

Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>

include/libssh/server.h

@@ -57,6 +57,7 @@ enum ssh_bind_options_e {
   SSH_BIND_OPTIONS_HOSTKEY_ALGORITHMS,
   SSH_BIND_OPTIONS_PROCESS_CONFIG,
   SSH_BIND_OPTIONS_MODULI,
+  SSH_BIND_OPTIONS_RSA_MIN_SIZE,
 };
 
 typedef struct ssh_bind_struct* ssh_bind;