Use UInt instead of u32 for max request size

Sometimes you just really want to upload a full disk image as media.

src/service/globals.rs

@@ -31,7 +31,7 @@ use ruma::{
     serde::Base64,
     DeviceId, MilliSecondsSinceUnixEpoch, OwnedEventId, OwnedRoomAliasId,
     OwnedRoomId, OwnedServerName, OwnedUserId, RoomAliasId, RoomVersionId,
-    ServerName, UserId,
+    ServerName, UInt, UserId,
 };
 use tokio::sync::{broadcast, Mutex, RwLock, Semaphore};
 use tracing::{error, warn, Instrument};
@@ -381,7 +381,7 @@ impl Service {
         self.config.server_name.as_ref()
     }
 
-    pub(crate) fn max_request_size(&self) -> u32 {
+    pub(crate) fn max_request_size(&self) -> UInt {
         self.config.max_request_size
     }