Change Details

``` cmake -GNinja -DENABLE_BIP70=ON .. ninja check cmake -GNinja -DENABLE_BIP70=OFF .. ninja check ../configure make check ../configure --disable-bip70 make check ```

``` cmake -GNinja -DENABLE_BIP70=ON .. ninja check cmake -GNinja -DENABLE_BIP70=OFF .. ninja check ../configure make check ../configure --disable-bip70 make check ``` Sanity check to make sure `bitcoin-qt` runs without errors.

``` cmake -GNinja -DENABLE_BIP70=ON .. ninja check cmake -GNinja -DENABLE_BIP70=OFF .. ninja check ../configure make check ../configure --disable-bip70 make check ``` Sanity check to make sure `bitcoin-qt` runs without errors.