ngtcp2: improve h3 response receiving

Closes #4259

ngtcp2: use nghttp3_version()

ngtcp2: sync with upstream API changes

Assisted-by: Tatsuhiro Tsujikawa

scp: fix directory name length used in memcpy

Fix read off end of array due to bad pointer math in getworkingpath for
SCP home directory case.

Closes #4258

http: the 'closed' struct field is used by both ngh2 and ngh3

and remove 'header_recvbuf', not used for anything

Reported-by: Jeremy Lainé

Closes #4257

ngtcp2: accept upload via callback

Closes #4256

defines: avoid underscore-prefixed defines

Double-underscored or underscore plus uppercase letter at least.

... as they're claimed to be reserved.

Reported-by: patnyb on gi

defines: avoid underscore-prefixed defines

Double-underscored or underscore plus uppercase letter at least.

... as they're claimed to be reserved.

Reported-by: patnyb on github

Fixes #4254
Closes #4255

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travis: add a build using ngtcp2 + nghttp3 (and a patched OpenSSL)

Runs no tests

Closes #4253

travis: bump to using nghttp2 version 1.39.2

Closes #4252

docs/examples/curlx: fix errors

Initialise 'mimetype' and require the -p12 arg.

Closes #4248

cleanup: remove DOT_CHAR completely

Follow-up to f9c7ba9096ec

The use of DOT_CHAR for ".ssh" was probably a mistake and is removed
now.

Pointed-out-by: Gisle Vanem

cleanup: remove DOT_CHAR completely

Follow-up to f9c7ba9096ec

The use of DOT_CHAR for ".ssh" was probably a mistake and is removed
now.

Pointed-out-by: Gisle Vanem
Bug: https://github.com/curl/curl/pull/4230#issuecomment-522960638

Closes #4247

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spnego_sspi: add typecast to fix build warning

Reported in build "Win32 target on Debian Stretch (64-bit) -
i686-w64-mingw32 - gcc-20170516"

Closes #4245

openssl: build warning free with boringssl

Closes #4244

curl: make --libcurl use CURL_HTTP_VERSION_3

Closes #4243

ngtcp2: make postfields-set posts work

Closes #4242

http: remove chunked-encoding and expect header use for HTTP/3

configure: use pkg-config to detect quiche

This removes the need to hard-code the quiche target path in
configure.ac.

This depends on https://github.com/cloudflare/quiche/pull/1

configure: use pkg-config to detect quiche

This removes the need to hard-code the quiche target path in
configure.ac.

This depends on https://github.com/cloudflare/quiche/pull/128

Closes #4237

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CURLOPT_SSL_VERIFYHOST: treat the value 1 as 2

For a long time (since 7.28.1) we've returned error when setting the
value to 1 to make applications notice that we stopped supported the o

CURLOPT_SSL_VERIFYHOST: treat the value 1 as 2

For a long time (since 7.28.1) we've returned error when setting the
value to 1 to make applications notice that we stopped supported the old
behavior for 1. Starting now, we treat 1 and 2 exactly the same.

Closes #4241

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curl: use .curlrc (with a dot) on Windows as well

Fall-back to _curlrc if the dot-version is missing.

Co-Authored-By: Steve Holme

Closes #4230

netrc: make the code try ".netrc" on Windows as well

... but fall back and try "_netrc" too if the dot version didn't work.

Co-Authored-By: Steve Holme

ngtcp2: use ngtcp2_version() to get the run-time version

... which of course doesn't have to be the same used at build-time.

Function just recently merged in ngtcp2.

ngtcp2: move the h3 initing to immediately after the rx key

To fix a segfault and to better deal with 0-RTT

Assisted-by: Tatsuhiro Tsujikawa

quiche: register debug callback once and earlier

The quiche debug callback is global and can only be initialized once, so
make sure we don't do it multiple times (e.g. if multiple reques

quiche: register debug callback once and earlier

The quiche debug callback is global and can only be initialized once, so
make sure we don't do it multiple times (e.g. if multiple requests are
executed).

In addition this initializes the callback before the connection is
created, so we get logs for the handshake as well.

Closes #4236

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ssh: add a generic Curl_ssh_version function for SSH backends

Closes #4235

base64: check for SSH, not specific SSH backends