[Xymon] Proxy HTTPS requests don't use CONNECT

Hi, I am trying to setup some squid proxy checks with Xymon 4.3.17 (or 4.3.28: I have 2 servers in manual failover).

• I added the --bb-proxy-syntax flag to the [xymonnet] section of tasks.cfg
• I added a line with "1.1.1.1 proxy # testip http://1.1.1.1:3128/https://github.com/" to hosts.cfg
• I spun up a tcpdump, and I see requests coming as "GET https://github.com/ HTTP/1.1" instead of the expected "CONNECT github.com:443"

The error page states:

https://www.github.com/ - Not Implemented

If I use "https" as the protocol for the proxy part, I get

https://github.com/ - SSL error

and

Unspecified SSL error in SSL_connect to 30755/tcp on host 1.1.1.1:

error:140770FC:SSL routines:SSL23_GET_SERVER_HELLO:unknown protocol

in the log (of course I cannot read the request through tcpdump)

Is there anything I am missing?

Thank you

-- Nicola