Adds a missing error_message sub, called in pkg-cacher-fetch.pl on line 200

Signed-off-by: Joshua Kugler <joshua@azariah.com>
Added support for SSL
Left no SSL as default for hosts without "http" at beginning
Added config variables for https_proxy and associated auth
Added ability to ignore SSL cert errors
Moved proxy check since SSL yes/no can vary between hosts

Signed-off-by: Joshua Kugler <joshua@azariah.com>
Merge pull request #15 from jkugler/support_https

Add HTTPS support and missing error_message sub.