Revert "merge configure.ac from upstream btc"
Revert "merge configure.ac from upstream btc"

This reverts commit ce2fd650adadcad7125ce1aecafb14523d4d4429 [formerly db2afb87b2f509835546bc925ebdf98fe2bbbf7d].


Former-commit-id: 2ba2b3d69b5c21224eb7cbe9ab47c27fb5095eeb
syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin