Backend https support

Merge pull request #109 from rekby/devel

Add backend https support

Fix bad http-proto and connection_id headers

#104

Switch to older golang, fix background cert renew

Merge pull request #101 from rekby/devel

Fix background renew

go 1.12

v0.21.3

go version to 1.12

Add profiler

Add support of go profiler - for research memory leak/cpu load.

Need enable in config.

Update go to 1.13

Update go compiler version

Switch to ACME v2 protocol

Updates:

• Switch protocol for certificates issue to ACMEv2
• Update dependencies

Backward incompatible changes:
Since not lets-proxy2 will not issue certificate for partially ok domain list.
If domain passed internal tests it must get authorize for create certificate.

In practive with default settings self-check is good and it will not be a problem.

switch to go 1.10

Merge pull request #89 from rekby/devel

switch to go 1.10 for test prevent memory leak on windows 2008 without r2

Fix renew expired certificate

Merge pull request #85 from rekby/devel

Fix renew expired certificate

KeepAlive

• Add keepalive config
• Doesn't issue certificate on system errors.

ATTENTION:
known bug - no renew expired certificates if it load from disk (expired without usage and no renewed in background).