disable rc4 and other weak ciphers on https proxy

[gotchazipc]

pass https://www.ssllabs.com/ssltest/analyze.html?d=auth.webida.org&latest

RC4 is not safe. deprecated all weak-ciphers of proxy server

• since proxy server uses http-master & it supports 'disableWeakCiphers'. Turn it on in proxy server code
• remove unused, confusing http/https server props of Proxy Server class
• cannot see logs. Enable logging via webida common logger class