Some HTTP configs were added as MgmtInt, but should be MgmtByte

Specifically I think these should be Byte's, to be consistent with the rest of the internals:

MgmtInt attach_server_session_to_client;
MgmtInt cache_open_write_fail_action

Now, changing this might break the same snapshot? jpeach@apache.org

Also, while going through these, a couple of overridable configs are marked as MgmtInt in InkAPI.cc, where in fact they are MgmtByte (so the inverse problem). I'll fix this as part of TS-4401.