bitcoin/bitcoin — pull request #5438 by Diapolo (2014-12-07 12:32:51+00:00)
Title: make all std::exception uses in catch() const

- I saw this on http://en.cppreference.com/w/cpp/language/try_catch and
thought it would be a good idea
- also unify used format to better be able to search for std::exception
uses in our codebase