Don't use reserved identifiers

[djarek]

Identifiers with double underscores (__foo) or underscore followed by a capital letter (_Foo) are reserved by the implementation, so should not be defined by libraries.
https://github.com/BrainlessLabs/bun/blob/master/include/blib/bun/impl/DbBackend.hpp#L25

[sp-mishra]

Okay. Will be changing it to something more relevant.