* fix: make variable a pointer-to-const
* fix: use init-statement to reduce variable scope
* fix: implicit conversion from long to int
* fix: refactor to not nest more than 3 if|for|do|while|switch statements
* fix: make tr_session::setSocketTos() const
* fix: use array.prototype.some instead of a for loop
* refactor: use nullptr instead of NULL
* fix: oops