Small fixes for the ecp case.

These fixes orgin from making freeradius_ecp start working.
Merge pull request #26 from lorenzogil/master

Actually try all bindings and don't stop when one is unsupported
Merge pull request #25 from HaToHo/master

Changes for free radius_ecp
Need argument name.
Merge branch 'master' of github.com:rohe/pysaml2