Merge branch 'scalar-and-non-interactive-authentication-in-maintenance'

This topic branch first merges the topic branch that teaches background
maintenance to avoid trying to authenticate interactively, and then
teaches `scalar reconfigure` to enforce that.

Signed-off-by: Johannes Schindelin <[email protected]>

Author: dscho

scalar.c

@@ -1126,7 +1126,8 @@ static int cmd_reconfigure(int argc, const char **argv)
 		old_repo = the_repository;
 		the_repository = &r;
 
-		if (set_recommended_config(1) >= 0)
+		if (set_recommended_config(1) >= 0 &&
+		    toggle_maintenance(1) >= 0)
 			succeeded = 1;
 
 		the_repository = old_repo;