Freeze default session options
Freeze default session options

Some code in my app have been accidentally mutating the default session options,
which broke some session behaviour.
It wasn't easy to track that down, so I'd like to suggest that we freeze this hash
to avoid mutation.
wjordan/rack,imtayadeway/rack,wjordan/rack,gfvcastro/rack,gfvcastro/rack,gfvcastro/rack,imtayadeway/rack,wjordan/rack,imtayadeway/rack