* Recognize GSSEncRequest as postgres proto
* Respond to GSSEncRequest with 'N' for 'not supported' in postgres engine
* Add test for GSSEncRequest to postgres via proxy
* Save gssencmode=disable in .pg_service.conf and test it
* Check for repeated startup encryption request
* Refactor postgres startup test code into its own test
* Test covers all code paths in the proxy startup handler
* Make postgres proxy tests run in parallel
* Reduced test execution time from 15 seconds to 4.5 seconds.
* Ran with race detector and all tests passed.
* Make sure we read at least one byte
* Fix lint
* Fix lint
* Change err to bad parameter
* Update test