url_easy_setopt.3: Add undocumented values of curl_infotype

... for debug function
axtls: call ssl_read repeatedly

Perform more work in between sleeps. This is work around the
fact that axtls does not expose any knowledge about when work needs
to be performed. Depending on connection and how often perform is
being called this can save ~25% of time on SSL handshakes (measured
on 20ms latency connection calling perform roughly every 10ms).
axtls: bump copyright year
curl_easy_setopt.3: Add another non-matching hostname

For the avoidance of doubt, show a domain which contains the no-proxy
pattern but not at the top level.
examples: remove all use of CURLM_CALL_MULTI_PERFORM

... since it is never returned since a long while back.
ConnectionDone: default maxconnects to 4 x number of easy handles

... as documented!
curl_multi_setopt.3: clarify CURLMOPT_MAXCONNECTS
configure: Fix the --disable-crypto-auth option

It now disables NTLM and GSS authentication methods, and produces
compilable code when SSL is enabled.
tests: Made the crypto test feature usable

This feature specifies the availability of cryptographic
authentication, which can be disabled at compile-time
multi: ignore sigpipe internally

When the multi API is used we must also ignore SIGPIPE signals when
caused by things we do, like they can easily be generated by OpenSSL.
RELEASE-NOTES: synced with 854aca5420f
http2: Support HTTP POST/PUT

This patch enables HTTP POST/PUT in HTTP2.
We disabled Expect header field and  chunked transfer encoding
since HTTP2 forbids them.
In HTTP1, Curl sends small upload data with request headers, but
HTTP2 requires upload data must be in DATA frame separately.
So we added some conditionals to achieve this.
curl_multi_add_handle.3: clarify multi vs easy use

it is only WHILE added to a multi handle that it can't be used with the
easy interface
curl_easy_perform.3: extended and clarified
libcurl.3: edited slightly to improve readability
curl_multi_assign.3: updated language
curl_version_info.3: added *HTTP2

... and edited language slightly
curl_version.3: recommend using curl_version_info() instead
curl.1: update the description of --tlsv1

... and mention the --tlsv1.[0-2] options in the --tslv1 entry

Reported-by: Hubert Kario
axtls: comment the call ssl_read repeatedly loop