New addition : --ca & --insecure flags

[marav]

Hi,
First, --insecure works great, thanks

The --ca flag still output the same warning

$ ~/go/bin/sl-feeds --ca /etc/ssl/certs/ca-certificates.crt -c ~/sl-feeds.toml
slackware64-current Head "https://slack.conraid.net/repository/slackware64-current/ChangeLog.txt": x509: certificate signed by unknown authority

I've tried :
--ca /etc/ssl/certs/ca-certificates.crt
--ca /usr/local/share/certs/ca-root-nss.crt

[marav]

no longer relevant