Only generate lowercase hostnames in register_wrapper_cap()

Hostnames are case insensitive and passing a URL through urlparse()
will always give you a lowercase domain name.

hippolyzer/lib/proxy/region.py

@@ -121,7 +121,7 @@ class ProxiedRegion(BaseClientRegion):
         parsed = list(urllib.parse.urlsplit(self._caps[name][1]))
         seed_id = self._caps["Seed"][1].split("/")[-1].encode("utf8")
         # Give it a unique domain tied to the current Seed URI
-        parsed[1] = f"{name}-{hashlib.sha256(seed_id).hexdigest()[:16]}.hippo-proxy.localhost"
+        parsed[1] = f"{name.lower()}-{hashlib.sha256(seed_id).hexdigest()[:16]}.hippo-proxy.localhost"
         # Force the URL to HTTP, we're going to handle the request ourselves so it doesn't need
         # to be secure. This should save on expensive TLS context setup for each req.
         parsed[0] = "http"