API change for FS (.lock = .exclusive).

src/context.zig

@@ -245,7 +245,7 @@ pub const Context = struct {
         // While the program is running, the lock is enabled.
         // Once the program stops (even if it crashes), the lock is then disabled.
         // Quit if the lock is still active.
-        const lock_opts = .{ .lock = .Exclusive, .lock_nonblocking = true };
+        const lock_opts = .{ .lock = .exclusive, .lock_nonblocking = true };
         _ = std.fs.createFileAbsolute(lock, lock_opts) catch |err| {
             log.err("cannot init server at {s}, lock {s} is causing a problem: {any}", .{ path, lock, err });
             log.err("you may have lauched the service twice.", .{});