replace cache XXX notes with ICE (in case of emergency) strings

www/common/outer/async-store.js

@@ -1631,7 +1631,7 @@ define([
                 Store.leavePad(null, data, function () {});
             };
             var conf = {
-                Cache: Cache, // XXX re-enable cache usage
+                Cache: Cache, // ICE pad cache
                 onCacheStart: function () {
                     postMessage(clientId, "PAD_CACHE");
                 },
@@ -2686,7 +2686,7 @@ define([
                 readOnly: false,
                 validateKey: secret.keys.validateKey || undefined,
                 crypto: Crypto.createEncryptor(secret.keys),
-                Cache: Cache, // XXX re-enable cache usage
+                Cache: Cache, // ICE drive cache
                 userName: 'fs',
                 logLevel: 1,
                 ChainPad: ChainPad,

www/common/outer/sharedfolder.js

@@ -175,7 +175,7 @@ define([
                 ChainPad: ChainPad,
                 classic: true,
                 network: network,
-                Cache: Cache, // XXX re-enable cache usage
+                Cache: Cache, // ICE shared-folder cache
                 metadata: {
                     validateKey: secret.keys.validateKey || undefined,
                     owners: owners

www/common/outer/team.js

@@ -427,7 +427,7 @@ define([
                 channel: secret.channel,
                 crypto: crypto,
                 ChainPad: ChainPad,
-                Cache: Cache, // XXX re-enable cache usage
+                Cache: Cache, // ICE team cache
                 metadata: {
                     validateKey: secret.keys.validateKey || undefined,
                 },