Fixed #18634 -- Don't escape variables in the context for startproject/startapp.

The & symbols which can come up in the secret key were
being escaped to &.

tests/regressiontests/admin_scripts/management/commands/custom_startproject.py

@@ -0,0 +1,11 @@
+from optparse import make_option
+
+from django.core.management.commands.startproject import Command as BaseCommand
+
+
+class Command(BaseCommand):
+    option_list = BaseCommand.option_list + (
+        make_option('--extra',
+                    action='store', dest='extra',
+                    help='An arbitrary extra value passed to the context'),
+        )