auth: fix crash on invalid bcrypt password When an invalid password was specified, it would with an exception: File "kallithea/lib/auth.py", in check_password return bcrypt.checkpw(safe_str(password), safe_str(hashed)) ValueError: Invalid hashed_password salt We do apparently have to catch ValueError and treat it as "invalid password".

# requirements.txt file for use as "pip install -r requirements.txt" as a
# readthedocs compatible alternative to "pip install -e ." which is a working
# alternative to "setup.py develop" which doesn't work with Mercurial 3.7
.