strict transport security vhost option flag and lwsws conf support

Signed-off-by: Andy Green <andy@warmcat.com>
diff --git a/lwsws/conf.c b/lwsws/conf.c
index 9c2bb06..d032df8 100644
--- a/lwsws/conf.c
+++ b/lwsws/conf.c
@@ -42,6 +42,7 @@
 	"vhosts[].port",
 	"vhosts[].interface",
 	"vhosts[].unix-socket",
+	"vhosts[].sts",
 	"vhosts[].host-ssl-key",
 	"vhosts[].host-ssl-cert",
 	"vhosts[].host-ssl-ca",
@@ -63,6 +64,7 @@
 	LEJPVP_PORT,
 	LEJPVP_INTERFACE,
 	LEJPVP_UNIXSKT,
+	LEJPVP_STS,
 	LEJPVP_HOST_SSL_KEY,
 	LEJPVP_HOST_SSL_CERT,
 	LEJPVP_HOST_SSL_CA,
@@ -190,7 +192,8 @@
 				       "!AES256-SHA256";
 		a->info->pvo = NULL;
 		a->info->keepalive_timeout = 60;
-		a->info->options &= ~(LWS_SERVER_OPTION_UNIX_SOCK);
+		a->info->options &= ~(LWS_SERVER_OPTION_UNIX_SOCK |
+				      LWS_SERVER_OPTION_STS);
 	}
 
 	if (reason == LEJPCB_OBJECT_START &&
@@ -280,6 +283,12 @@
 		else
 			a->info->options &= ~(LWS_SERVER_OPTION_UNIX_SOCK);
 		return 0;
+	case LEJPVP_STS:
+		if (arg_to_bool(ctx->buf))
+			a->info->options |= LWS_SERVER_OPTION_STS;
+		else
+			a->info->options &= ~(LWS_SERVER_OPTION_STS);
+		return 0;
 	case LEJPVP_HOST_SSL_KEY:
 		a->info->ssl_private_key_filepath = a->p;
 		break;