TShock.ConfigFile was deprecated and therefore changes applied in
previous commits were not applied until now.
See:
* f567486c47
* 39147355c1
* 597e403d50
This commit allows server operators to disable build permission failure
notices. This is because some servers wish to have a "silent" operation
mode where the server doesn't send out these messages to users. This
makes sense, e.g., when the server is a "museum" and isn't intended to
be changed.
