rotctl: actually quit when receiving the quit message

Since gpredict doesn't have a park button or anything, this will just
automatically park the antenna when the gpredict rotator controller
disconnects. This may or may not actually be a good idea. We will see.

src/RotCtl.zig

@@ -37,8 +37,7 @@ pub fn run(allocator: std.mem.Allocator) !void {
         const client = try server.accept();
         defer {
             log.info("disconnecting client", .{});
-            if (!config.rotctl.autopark)
-                interface.rotator.stop();
+            interface.rotator.stop();
             client.stream.close();
         }
 
@@ -61,11 +60,10 @@ pub fn run(allocator: std.mem.Allocator) !void {
         }
 
         // loop ended due to client disconnect
-        if (interface.running and config.rotctl.autopark)
+        if (interface.running and config.rotctl.autopark) {
             interface.rotator.startPark();
+        }
     }
-
-    interface.rotator.control_thread.join();
 }
 
 fn write(self: *RotCtl, buf: []const u8) !void {
@@ -177,6 +175,7 @@ fn handleHamlibCommand(
     if (first.len == 1 or first[0] == '\\') {
         switch (first[0]) {
             // NOTE: this is not technically supported by rotctld.
+            'q', 'Q' => try self.quit(first, &tokens),
             'S' => try self.stop(first, &tokens),
             'K' => try self.park(first, &tokens),
             'p' => try self.getPosition(first, &tokens),
@@ -247,8 +246,8 @@ const HamlibCommand = struct {
 };
 
 const rotctl_commands = [_]HamlibCommand{
-    .{ .long = "quit", .callback = quit },
-    .{ .long = "exit", .callback = quit },
+    .{ .short = 'q', .callback = quit }, // quit
+    .{ .short = 'Q', .callback = quit }, // quit
     .{ .long = "AOS", .callback = blindAck },
     .{ .long = "LOS", .callback = blindAck },
     .{ .short = 'P', .long = "set_pos", .callback = setPosition }, // azimuth: f64, elevation: f64