About h2 server config `DEFAULT_SETTINGS_MAX_HEADER_LIST_SIZE`

[wisdom-yzh]

Version
hyper 1.3.1
h2 0.4.5

Description
Why DEFAULT_SETTINGS_MAX_HEADER_LIST_SIZE for h2 protocol changed from 16MB to 16KB in hyper 1.3.1 ?

In h2 lib and earlier hyper, the default value is 16MB, while in hyper-1.3.1 it changed to 16KB. As a result, some http requests triggered from golang x/net/http2 package with long url or big headers encounter failure http2: request header list larger than peer's advertised limit.