move wellKnownJson to domains

after some more thought:
* If app moves to another location, user has to remember to move all this config
* It's not really associated with an app. It's to do with the domain info
* We can put some hints in the UI if app is missing.

part of #703

src/apps.js

@@ -20,7 +20,6 @@ exports = module.exports = {
     setMemoryLimit,
     setCpuShares,
     setMounts,
-    setWellKnown,
     setAutomaticBackup,
     setAutomaticUpdate,
     setReverseProxyConfig,
@@ -406,7 +405,7 @@ function removeInternalFields(app) {
         'location', 'domain', 'fqdn', 'mailboxName', 'mailboxDomain',
         'accessRestriction', 'manifest', 'portBindings', 'iconUrl', 'memoryLimit', 'cpuShares',
         'sso', 'debugMode', 'reverseProxyConfig', 'enableBackup', 'creationTime', 'updateTime', 'ts', 'tags',
-        'label', 'alternateDomains', 'env', 'enableAutomaticUpdate', 'dataDir', 'mounts', 'wellKnown');
+        'label', 'alternateDomains', 'env', 'enableAutomaticUpdate', 'dataDir', 'mounts');
 }
 
 // non-admins can only see these
@@ -983,22 +982,6 @@ function setMounts(app, mounts, auditSource, callback) {
     });
 }
 
-function setWellKnown(app, wellKnown, auditSource, callback) {
-    assert.strictEqual(typeof app, 'object');
-    assert.strictEqual(typeof wellKnown, 'object');
-    assert.strictEqual(typeof auditSource, 'object');
-    assert.strictEqual(typeof callback, 'function');
-
-    const appId = app.id;
-    appdb.update(appId, { wellKnown }, function (error) {
-        if (error) return callback(error);
-
-        eventlog.add(eventlog.ACTION_APP_CONFIGURE, auditSource, { appId, app, wellKnown });
-
-        callback();
-    });
-}
-
 function setEnvironment(app, env, auditSource, callback) {
     assert.strictEqual(typeof app, 'object');
     assert.strictEqual(typeof env, 'object');