Breaking: Provide new user object instead of id.

Fix rustup complaining about join macros.

src/database/permissions/mod.rs

@@ -9,6 +9,7 @@ pub struct PermissionCalculator<'a> {
     perspective: &'a User,
 
     user: Option<&'a User>,
+    relationship: Option<&'a RelationshipStatus>,
     channel: Option<&'a Channel>,
 
     has_mutual_connection: bool,
@@ -20,6 +21,7 @@ impl<'a> PermissionCalculator<'a> {
             perspective,
 
             user: None,
+            relationship: None,
             channel: None,
 
             has_mutual_connection: false,
@@ -33,6 +35,13 @@ impl<'a> PermissionCalculator<'a> {
         }
     }
 
+    pub fn with_relationship(self, relationship: &'a RelationshipStatus) -> PermissionCalculator {
+        PermissionCalculator {
+            relationship: Some(&relationship),
+            ..self
+        }
+    }
+
     pub fn with_channel(self, channel: &'a Channel) -> PermissionCalculator {
         PermissionCalculator {
             channel: Some(&channel),