[LyX/master] Until there is some more general solution… prepare 2.1 prefs migration manually.

[Stephan Witt]

commit f24feb9038e80d545d157a78418bd11272993af5
Author: Stephan Witt <sw...@lyx.org>
Date:   Tue Apr 29 21:43:41 2014 +0200

    Until there is some more general solution… prepare 2.1 prefs migration 
manually.

diff --git a/lib/configure.py b/lib/configure.py
index 8a8473c..ddaeb0c 100644
--- a/lib/configure.py
+++ b/lib/configure.py
@@ -160,7 +160,7 @@ def checkUpgrade():
         logger.info('Checking for upgrade from previous version.')
         parent = os.path.dirname(cwd)
         appname = basename[:(-len(version_suffix))]
-        for version in ['-2.0', '-1.6' ]:
+        for version in ['-2.1', '-2.0', '-1.6' ]:
             logger.debug('Checking for upgrade from previous version ' + 
version)
             previous = os.path.join(parent, appname + version)
             logger.debug('previous = ' + previous)