Merge bitcoin#11626: rpc: Make logging RPC public

cabff75 rpc: Make logging RPC public (Wladimir J. van der Laan)

Pull request description:

  This started out as a developer hack but now it's useful enough for general use. Unhide the call by moving it to `control` category. This makes it documented in `help`.

Tree-SHA512: f45fa378558b552d4e2a110bf85100b0eaaa6180bb5f62cb54a251f66026d4625b670c69d85c281eebbf4b56b80b65618c51a5a593b8f9d0a04b31e95adc91f4

src/rpc/misc.cpp

@@ -1292,6 +1292,7 @@ static const CRPCCommand commands[] =
     { "control",            "debug",                  &debug,                  {} },
     { "control",            "getinfo",                &getinfo,                {} }, /* uses wallet if enabled */
     { "control",            "getmemoryinfo",          &getmemoryinfo,          {"mode"} },
+    { "control",            "logging",                &logging,                {"include", "exclude"}},
     { "util",               "validateaddress",        &validateaddress,        {"address"} }, /* uses wallet if enabled */
     { "util",               "createmultisig",         &createmultisig,         {"nrequired","keys"} },
     { "util",               "verifymessage",          &verifymessage,          {"address","signature","message"} },
@@ -1313,7 +1314,6 @@ static const CRPCCommand commands[] =
     { "hidden",             "setmocktime",            &setmocktime,            {"timestamp"}},
     { "hidden",             "echo",                   &echo,                   {"arg0","arg1","arg2","arg3","arg4","arg5","arg6","arg7","arg8","arg9"}},
     { "hidden",             "echojson",               &echo,                   {"arg0","arg1","arg2","arg3","arg4","arg5","arg6","arg7","arg8","arg9"}},
-    { "hidden",             "logging",                &logging,                {"include", "exclude"}},
 };
 
 void RegisterMiscRPCCommands(CRPCTable &t)