curl_version_info.3: mentioned ALTSVC and HTTP3

... and sorted the list alphabetically

lib/quic.c: unused - removed

CURLOPT_ALTSVC_CTRL.3: remove CURLALTSVC_ALTUSED

Follow-up to 98c3f148 that removed it from the header file

docs/HTTP3: simplify quiche build instruction

Use --recursive to get boringssl in one line

Closes #4219

altsvc: make it use h3-22 with ngtcp2 as well

ngtcp2: initial h3 request work

Closes #4217

curl_version_info: offer quic (and h3) library info

Closes #4216

HTTP3: use ngtcp2's draft-22 branch

RELEASE-NOTES: synced

CURLOPT_READFUNCTION.3: provide inline example

... instead of mentioning one in another place

ngtcp2: send HTTP/3 request with nghttp3

This commit makes sending HTTP/3 request with nghttp3 work. It
minimally receives HTTP response and calls nghttp3 callbacks, but no
processi

ngtcp2: send HTTP/3 request with nghttp3

This commit makes sending HTTP/3 request with nghttp3 work. It
minimally receives HTTP response and calls nghttp3 callbacks, but no
processing is made at the moment.

Closes #4215

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nghttp3: initial h3 template code added

nghttp3: required when ngtcp2 is used for QUIC

- checked for by configure
- updated docs/HTTP3.md
- shown in the version string

Closes #4210

asyn-thread: issue CURL_POLL_REMOVE before closing socket

This avoids EBADF errors from EPOLL_CTL_DEL operations in the
ephiperfifo.c example. EBADF is dangerous in multi-threaded
a

asyn-thread: issue CURL_POLL_REMOVE before closing socket

This avoids EBADF errors from EPOLL_CTL_DEL operations in the
ephiperfifo.c example. EBADF is dangerous in multi-threaded
applications where I rely on epoll_ctl to operate on the same
epoll description from different threads.

Follow-up to eb9a604f8d7db8

Bug: https://curl.haxx.se/mail/lib-2019-08/0026.html
Closes #4211

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configure: avoid undefined check_for_ca_bundle

instead of using a "greater than 0" test, check for variable being
set, as it is always set to 1, and could be left unset if non of
OPE

configure: avoid undefined check_for_ca_bundle

instead of using a "greater than 0" test, check for variable being
set, as it is always set to 1, and could be left unset if non of
OPENSSL MBEDTLS GNUTLS WOLFSSL is being configured for.

Closes #4213

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ngtcp2: Send ALPN h3-22

Closes #4212

ngtcp2: use ngtcp2_settings_default and specify initial_ts

curl_global_init_mem.3: mention it was added in 7.12.0

ngtcp2: make the QUIC handshake work

Closes #4209

HTTP3.md: Update quiche build instructions

Added cloning for quiche and BoringSSL and modified the build
instructions so they work on a clean folder.

Closes #4208

CURLOPT_H3: removed

There's no use for this anymore and it was never in a release.

Closes #4206

http3: make connection reuse work

Closes #4204

quiche: add SSLKEYLOGFILE support

cleanup: s/curl_debug/curl_dbg_debug in comments and docs

Leftovers from the function rename back in 76b63489495

Reported-by: Gisle Vanem
Bug: https://github.com/curl/curl/commi

cleanup: s/curl_debug/curl_dbg_debug in comments and docs

Leftovers from the function rename back in 76b63489495

Reported-by: Gisle Vanem
Bug: https://github.com/curl/curl/commit/f3e0f071b14fcb46a453f69bdf4e062bcaacf362#com
mitcomment-34601751

Closes #4203

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RELEASE-NOTES: synced