Fixes the following security issues:
- CVE-2021-31525: ReadRequest and ReadResponse in net/http can hit an
unrecoverable panic when reading a very large header (over 7MB on 64-bit
architectures, or over 4MB on 32-bit ones). Transport and Client are
vulnerable and the program can be made to crash by a malicious server.
Server is not vulnerable by default, but can be if the default max header
of 1MB is overridden by setting Server.MaxHeaderBytes to a higher value,
in which case the program can be made to crash by a malicious client.
https://github.com/golang/go/issues/45710
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
1cfc01a008