XOP-229: Stored in Stunnel.t if the connection is verified.

Signed-off-by: Jerome Maloberti <jerome.maloberti@citrix.com>
XOP-229: Change keep_alive=true and http version = 1.1.

Signed-off-by: Jerome Maloberti <jerome.maloberti@citrix.com>
XOP-229: The stunnel_cache key uses also the verify_cert bool.

Signed-off-by: Jerome Maloberti <jerome.maloberti@citrix.com>
Merge pull request #124 from jeromemaloberti/XOP-229

XOP-229: Stunnel_cache fixes.