[squid-users] header_access ssl multiple cache_peers? Redirect http to https

[chiasa.men]

hello
there a two cache_peers with ssl enabled webservers. Obviously for both the 
private keys are available. 
For http_port squid can use header_access to filter headers.
Can squid make use of the known private keys in order to filter the headers for 
https_port connetions too?
How?
Is the any method at all to filter headers in ssl connections?

Is it possible to make squid redirect http to https? How?
(http://example.com redirect to  https://example.com)

regards
chiasa