Informations about Auth-Type section

Hi guys, I see on previous post that there is an idea to change sections on 3.1 and there is a comment related with Auth-Type module. 1. Currently, I'm using Auth-Type section for handle CHAP/PAP authentication. If Auth-Type section will be remove how I said to freeradius server to check for PAP or CHAP password ? 2. Currently on 3.0 tree Auth-Type is not usable inside pre-proxy or authorize section. Is there a way to handle authentication in proxy process (or in authorize or in pre-proxy section)? 3. If I undenstand correctly with 3.1 check if username/password are correct will be handled always in process section also for proxy flow. Is it correct? Thanks in advance geaaru