Changelog:
===========
- Change accepted environment name rule: must be made up of factors defined in
configuration or match regex (pypy|py|cython|)((\d(\.\d+(\.\d+)?)?)|\d+)?.
- --override foo+=bar appending syntax will now work correctly when foo wasn't
defined in tox.ini.
- Disallow command line environments which are not explicitly specified in the config file
Signed-off-by: Wang Mingyu <wangmy@fujitsu.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>
