ssl-proxies: Add information about chain to CertPathValidationException

CertPathValidationException has fields to capture the CertPath and
certificate index that triggered the validation failure. This allows
an application to provide more information about the failure to the
user. Yet, JGlobus didn't fill in these fields of the exception,
meaning that the user would not be offered any information beyond
a simple error message saying that the certificate was rejected.

This patch adds the missing information. An application still has to
detect the exception in the exception cause chain and present it to
the user in some form.
Try newer version of maven release to see if it clears up the git issues.
Include sonatype fixes from 2.0.5.
Merge pull request #91 from gbehrmann/feature/certpathvalidationexception_includes_certpath

ssl-proxies: Add information about chain to CertPathValidationException
gss: Empty application data messages must not trigger end-of-stream

Addresses an issue in which SSL application data messages with zero
payload are misinterpreted as end-of-stream. This bug causes JGlobus
to fail with more recent versions of curl.
(cherry picked from commit 4fcd4f1e0569b5952ecb8ab097ea5bf51c9d2452)
Merge pull request #101 from gbehrmann/fix/empty-ssl-message

gss: Empty application data messages must not trigger end-of-stream