libnetconf2 CI

session REFACTOR clarify server/client side when receiving hello #356

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Run time

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Job	Run time
Get git branch	1s
Release, gcc, OpenSSL	1m 56s
Release, gcc, MbedTLS	2m 0s
Release, clang	1m 29s
Debug, gcc, OpenSSL	3m 16s
Debug, gcc, MbedTLS	3m 29s
Debug, clang	1m 30s
No SSH nor TLS	1m 25s
ASAN and UBSAN, OpenSSL	1m 33s
ASAN and UBSAN, MbedTLS	2m 0s
ABI Check	1m 46s
	20m 25s