config: refactor beaker configuration While refactoring: * drop support for 'cache.' prefix - it is only 'beaker.config.' that ever has been documented or used in examples * make prefix stripping more safe (if the prefix should appear twice in the key) * trust exactly what has been configured - drop stripping of strings * drop int conversion of 'expire' - beaker documentation suggests strings are fine

syntax: glob
*.pyc
*.swp
*.sqlite
*.tox
*.egg-info
*.egg
*.mo
.eggs/
tarballcache/

syntax: regexp
^rcextensions
^build
^dist/
^docs/build/
^docs/_build/
^data$
^sql_dumps/
^\.settings$
^\.project$
^\.pydevproject$
^\.coverage$
^kallithea\.db$
^test\.db$
^Kallithea\.egg-info$
^my\.ini$
^fabfile.py
^\.idea$
^\.cache$
/__pycache__$