Deprecating gQUIC support

[jogme]

Is there a reason for keeping the Google QUIC implementation in the code or could it be already deprecated?

The documentation page says:

gQUIC Google QUIC. The original lsquic supported only Google QUIC. gQUIC is going to become obsolete. (Hopefully soon).

[litespeedtech]

I think some users still use gQUIC instead of IETF QUIC.
And it has to be done in a major version, and it is considerable amount of efforts.
On the other hand, a code base for IETF QUIC only can be more efficient and cleaner.

[jogme]

In that case conditional build with enable-gquic could gap the need to provide gquic support and would also help to move forward from it. Would that be a possibility you could work with?

[litespeedtech]

That's OK, I think it introduces more work, as we need to keep both with/without gquic support work properly whenever changing the code. :-)