Implement SSPI authentication #538

Job	Run time	Billable time
test-postgres (9.5)	3m 57s	0s
test-platforms (3.8, ubuntu-latest, asyncio)	3m 9s	0s
test-postgres (9.6)	3m 54s	0s
test-platforms (3.8, ubuntu-latest, uvloop)	3m 22s	0s
test-postgres (10)	3m 39s	0s
test-platforms (3.8, macos-latest, asyncio)	5m 34s	0s
test-platforms (3.8, macos-latest, uvloop)	2m 35s	0s
test-postgres (11)	3m 36s	0s
test-platforms (3.8, windows-latest, asyncio)	5m 25s	0s
test-postgres (12)	3m 33s	0s
test-platforms (3.9, ubuntu-latest, asyncio)	3m 8s	0s
test-postgres (13)	3m 56s	0s
test-platforms (3.9, ubuntu-latest, uvloop)	3m 19s	0s
test-postgres (14)	3m 50s	0s
test-platforms (3.9, macos-latest, asyncio)	3m 46s	0s
test-postgres (15)	3m 19s	0s
test-platforms (3.9, macos-latest, uvloop)	3m 30s	0s
test-postgres (16)	3m 32s	0s
test-platforms (3.9, windows-latest, asyncio)	4m 48s	0s
test-platforms (3.10, ubuntu-latest, asyncio)	3m 5s	0s
test-platforms (3.10, ubuntu-latest, uvloop)	3m 9s	0s
test-platforms (3.10, macos-latest, asyncio)	2m 46s	0s
test-platforms (3.10, macos-latest, uvloop)	2m 35s	0s
test-platforms (3.10, windows-latest, asyncio)	5m 19s	0s
test-platforms (3.11, ubuntu-latest, asyncio)	3m 6s	0s
test-platforms (3.11, ubuntu-latest, uvloop)	3m 16s	0s
test-platforms (3.11, macos-latest, asyncio)	4m 48s	0s
test-platforms (3.11, macos-latest, uvloop)	6m 23s	0s
test-platforms (3.11, windows-latest, asyncio)	5m 17s	0s
test-platforms (3.12, ubuntu-latest, asyncio)	3m 26s	0s
test-platforms (3.12, macos-latest, asyncio)	3m 4s	0s
test-platforms (3.12, windows-latest, asyncio)	4m 42s	0s
Regression Tests	1s	0s
	2h 2m 49s	0s

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