Update --tunnel option description in wsssht help

- Change 'Transport types' to 'Transport' in --tunnel option description
- Add 'or websocket' to the description for clarity
- Update both usage message in wsssht.c and man page wsssht.1

wssshtools/man/wsssht.1

@@ -47,8 +47,8 @@ Connection retry interval in seconds (default: 5)
 .BR \-\-debug
 Enable debug output
 .TP
-.BR \-\-tunnel " \fITYPES\fR"
-Transport types for data channel (comma\-separated or 'any', default: any)
+.BR \-\-tunnel " \fITRANSPORT\fR"
+Transport for data channel (comma\-separated or 'any', or 'websocket'  default: any)
 .TP
 .BR \-\-tunnel\-control " \fITYPES\fR"
 Transport types for control channel (comma\-separated or 'any', default: any)

wssshtools/wsssht.c

@@ -52,7 +52,7 @@ void print_usage(const char *program_name) {
     fprintf(stderr, "  --wssshd-port PORT   wssshd server port (default: 9898)\n");
     fprintf(stderr, "  --interval SEC       Connection retry interval in seconds (default: 5)\n");
     fprintf(stderr, "  --debug              Enable debug output\n");
-    fprintf(stderr, "  --tunnel TYPES       Transport types for data channel (comma-separated or 'any', default: any)\n");
+    fprintf(stderr, "  --tunnel TRANSPORT      Transport for data channel (comma-separated or 'any', or 'websocket'  default: any)\n");
     fprintf(stderr, "  --tunnel-control TYPES Transport types for control channel (comma-separated or 'any', default: any)\n");
     fprintf(stderr, "  --service SERVICE    Service type (default: ssh)\n");
     fprintf(stderr, "  --help               Show this help\n");