Use /group/name/ as the main page for the group.

We used to omit the slash, which users found confusing.

static/galene.js

@@ -3089,7 +3089,9 @@ async function serverConnect() {
 }
 
 function start() {
-    group = decodeURIComponent(location.pathname.replace(/^\/[a-z]*\//, ''));
+    group = decodeURIComponent(
+        location.pathname.replace(/^\/[a-z]*\//, '').replace(/\/$/, '')
+    );
     setTitle(capitalise(group));
     addFilters();
     setMediaChoices(false).then(e => reflectSettings());

static/mainpage.js

@@ -24,7 +24,7 @@ document.getElementById('groupform').onsubmit = function(e) {
     e.preventDefault();
     let group = document.getElementById('group').value.trim();
     if(group !== '')
-        location.href = '/group/' + group;
+        location.href = '/group/' + group + '/';
 };
 
 async function listPublicGroups() {
@@ -59,8 +59,8 @@ async function listPublicGroups() {
         let tr = document.createElement('tr');
         let td = document.createElement('td');
         let a = document.createElement('a');
-        a.textContent = group.name;
-        a.href = '/group/' + encodeURIComponent(group.displayName || group.name);
+        a.textContent = group.displayName || group.name;
+        a.href = '/group/' + group.name + '/';
         td.appendChild(a);
         tr.appendChild(td);
         let td2 = document.createElement('td');

webserver/webserver.go

@@ -283,8 +283,9 @@ func groupHandler(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	if r.URL.Path != "/group/"+name {
-		http.Redirect(w, r, "/group/"+name, http.StatusPermanentRedirect)
+	if r.URL.Path != "/group/"+name+"/" {
+		http.Redirect(w, r, "/group/"+name+"/",
+			http.StatusPermanentRedirect)
 		return
 	}