-   o Code simplification and refactoring:
 
-     - In order to make the OR and dir checking function in router.c less
 
-       confusing we renamed some functions and consider_testing_reachability()
 
-       has been splitted into router_should_check_reachability() and
 
-       router_do_reachability_checks(). Also we improved the documentation in
 
-       some functions. Closes ticket 18918.
 
 
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