Connection_ap_about_to_close should call connection_edge_about_to_close.
In a2ad31a92, we split connection_about_to_close into separate functions. And we made connection_edge_about_to_close hold the common logic for AP_CONN and EXIT_CONN. But... we never made connection_ap_about_to_close call connection_edge_about_to_close!
This should be harmless in 0.2.7 and earlier, since all connection_edge_about_to_close does is (possibly) generate a warning. But In 0.2.8 for #17590 (moved), we shoved a bunch of code in connection_edge_about_to_close that really does matter, for entry connections that are pending circuits.
Bug in 0.2.3.2-alpha.
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