Fix some missing SSL exception checks
Fix some missing SSL exception checks

Wasn't always checking for SSL.WantReadError, leading to connections
getting killed on short reads.

digideskio/nogotofail,google/nogotofail,mkenne11/nogotofail,digideskio/nogotofail,google/nogotofail,mkenne11/nogotofail,leasual/nogotofail,mkenne11/nogotofail-pii,leasual/nogotofail,joshcooper/nogotofail,mkenne11/nogotofail-pii,joshcooper/nogotofail