make copies of "constant" lists, so that users can .remove() on them
make copies of "constant" lists, so that users can .remove() on them

because lists are passed as a reference in Python, we need to make
copies of the "const" lists for use inside HandshakeSettings, this
way users can do a settings.macNames.remove("aead") for example

ioef/tlslite-ng,ioef/tlslite-ng,ioef/tlslite-ng