Bump maximum header size to 16K (#469)
Bump maximum header size to 16K (#469)

Necessary because mod_auth_openidc passes in a group list that can be quite large

Fixes #468
tinnightcap/nubis-ci,gozer/nubis-ci,tinnightcap/nubis-ci,gozer/nubis-ci,Nubisproject/nubis-ci,Nubisproject/nubis-ci