move index sorting to index module

This is a historic detail of the index format, so move it there.
For wiki update and status json there's really no reason why this should
be done in alphabetic app name order. Use the default sort order by
appid.

fdroidserver/index.py

@@ -44,13 +44,12 @@ from fdroidserver.common import FDroidPopen, FDroidPopenBytes, load_stats_fdroid
 from fdroidserver.exception import FDroidException, VerificationException, MetaDataException
 
 
-def make(apps, sortedids, apks, repodir, archive):
+def make(apps, apks, repodir, archive):
     """Generate the repo index files.
 
     This requires properly initialized options and config objects.
 
     :param apps: fully populated apps list
-    :param sortedids: app package IDs, sorted
     :param apks: full populated apks list
     :param repodir: the repo directory
     :param archive: True if this is the archive repo, False if it's the
@@ -101,6 +100,9 @@ def make(apps, sortedids, apks, repodir, archive):
     if mirrors:
         repodict['mirrors'] = mirrors
 
+    # Historically the index has been sorted by App Name, so we enforce this ordering here
+    sortedids = sorted(apps, key=lambda appid: apps[appid].Name.upper())
+
     appsWithPackages = collections.OrderedDict()
     for packageName in sortedids:
         app = apps[packageName]