Since the initial Stroke TLS implementation was done, some changes were made in Swiften, starting with "Show Certificate dialog from certificate error window." 159e773b156f531575d0d7e241e2d20c85ee6d7cA which mean that certificate verification uses the peer's certificate chain, and not just the peer's EE certificate. This change updates Stroke so that its API now more closely matches what Swiften does. Note that any current Stroke clients that implement the "CertificateTrustChecker" interface will break, as this patch makes an incompatible change to that interface, requiring implementing classes to handle a certificate chain rather than a single certificate. Isode copyright notices are updated; Remko copyright notices are updated to reflect the current copyright notices in any equivalent Swiften source files. Test-information: Used MLC (after having patched it for CertificateTrustChecker changes) and verified that it sees the entire certificate chain coming back. Ran self-tests for Stroke and saw no junit failures Change-Id: I3d863f929bfed3324446cadf3bb4d6b9ff916660