lib: connect/h2/h3 refactor

Refactoring of connection setup and happy eyeballing. Move
nghttp2. ngtcp2, quiche and msh3 into connection filters.

 - eyeballing cfilter that uses sub-filters for performing parallel connects
 - socket cfilter for all transport types, including QUIC
 - QUIC implementations in cfilter, can now participate in eyeballing
 - connection setup is more dynamic in order to adapt to what filter did
   really connect.  Relevant to see if a SSL filter needs to be added or
   if SSL has already been provided
 - HTTP/3 test cases similar to HTTP/2
 - multiuse of parallel transfers for HTTP/3, tested for ngtcp2 and quiche

 - Fix for data attach/detach in VTLS filters that could lead to crashes
   during parallel transfers.
 - Eliminating setup() methods in cfilters, no longer needed.
 - Improving Curl_conn_is_alive() to replace Curl_connalive() and
   integrated ssl alive checks into cfilter.
 - Adding CF_CNTRL_CONN_INFO_UPDATE to tell filters to update
   connection into and persist it at the easy handle.

 - Several more cfilter related cleanups and moves:
   - stream_weigth and dependency info is now wrapped in struct
     Curl_data_priority
   - Curl_data_priority members depend is available in HTTP2|HTTP3
   - Curl_data_priority members depend on NGHTTP2 support
   - handling init/reset/cleanup of priority part of url.c
   - data->state.priority same struct, but shallow copy for compares only

 - PROTOPT_STREAM has been removed
   - Curl_conn_is_mulitplex() now available to check on capability

 - Adding query method to connection filters.
   - ngtcp2+quiche: implementing query for max concurrent transfers.

 - Adding is_alive and keep_alive cfilter methods. Adding DATA_SETUP event.
   - setting keepalive timestamp on connect
   - DATA_SETUP is called after the connection has been completely
     setup (but may not connected yet) to allow filters to initialize
     data members they use.

 - there is no socket to be had with msh3, it is unclear how select
   shall work

 - manual test via "curl --http3 https://curl.se" fail with "empty
   reply from server".

 - Various socket/conn related cleanups:
   - Curl_socket is now Curl_socket_open and in cf-socket.c
   - Curl_closesocket is now Curl_socket_close and in cf-socket.c
   - Curl_ssl_use has been replaced with Cur_conn_is_ssl
   - Curl_conn_tcp_accepted_set has been split into
     Curl_conn_tcp_listen_set and Curl_conn_tcp_accepted_set
     with a clearer purpose

Closes #10141

tests/data/Makefile.inc

@@ -246,7 +246,7 @@ test2300 test2301 test2302 test2303 test2304 \
 \
 test2400 test2401 test2402 \
 \
-test2500 \
+test2500 test2501 test2502 \
 \
 test3000 test3001 test3002 test3003 test3004 test3005 test3006 test3007 \
 test3008 test3009 test3010 test3011 test3012 test3013 test3014 test3015 \

tests/data/test2501

@@ -0,0 +1,70 @@
+<testcase>
+<info>
+<keywords>
+HTTP
+HTTP POST
+HTTP/3
+HTTPS
+</keywords>
+</info>
+
+#
+# Server-side
+<reply>
+<data nocheck="yes">
+HTTP/1.1 201 OK
+Date: Tue, 09 Nov 2010 14:49:00 GMT
+Connection: close
+Content-Length: 0
+Funny-head: yesyes
+
+</data>
+</reply>
+
+#
+# Client-side
+<client>
+<features>
+debug
+http
+http/3
+</features>
+<server>
+http
+http/3
+</server>
+ <name>
+HTTP/3 POST
+ </name>
+<setenv>
+</setenv>
+ <command>
+-k --http3 "https://%HOSTIP:%HTTP3PORT/%TESTNUMBER" -d "moo"
+</command>
+
+</client>
+
+#
+# Verify data after the test has been "shot"
+<verify>
+<stdout>
+HTTP/3 201 
+date: Tue, 09 Nov 2010 14:49:00 GMT
+content-length: 0
+funny-head: yesyes
+via: 1.1 nghttpx
+
+</stdout>
+<protocol nonewline="yes">
+POST https://%HOSTIP:%HTTP3PORT/2501 HTTP/1.1
+Host: %HOSTIP:%HTTP3PORT
+User-Agent: curl/%VERSION
+Accept: */*
+Content-Length: 3
+Content-Type: application/x-www-form-urlencoded
+Via: 3 nghttpx
+
+moo
+</protocol>
+</verify>
+</testcase>

tests/data/test2502

@@ -0,0 +1,104 @@
+<testcase>
+<info>
+<keywords>
+HTTP
+HTTP/3
+multi
+verbose logs
+</keywords>
+</info>
+
+# Server-side
+<reply>
+<data1 crlf=yes">
+HTTP/1.1 200 OK
+Date: Tue, 09 Nov 2010 14:49:00 GMT
+Server: server.example.com
+Content-Length: 47
+
+file contents should appear once for each file
+</data1>
+<data2>
+HTTP/1.1 200 OK
+Date: Tue, 09 Nov 2010 14:49:00 GMT
+Server: server.example.com
+Content-Length: 47
+
+file contents should appear once for each file
+</data2>
+<data3>
+HTTP/1.1 200 OK
+Date: Tue, 09 Nov 2010 14:49:00 GMT
+Server: server.example.com
+Content-Length: 47
+
+file contents should appear once for each file
+</data3>
+<data4>
+HTTP/1.1 200 OK
+Date: Tue, 09 Nov 2010 14:49:00 GMT
+Server: server.example.com
+Content-Length: 47
+
+file contents should appear once for each file
+</data4>
+</reply>
+
+# Client-side
+<client>
+<features>
+http/3
+</features>
+<server>
+http
+http/3
+</server>
+<tool>
+lib%TESTNUMBER
+</tool>
+ <name>
+HTTP GET multiple over HTTP/3
+ </name>
+ <command>
+https://%HOSTIP:%HTTP3PORT/path/%TESTNUMBER %HOSTIP %HTTP3PORT
+</command>
+</client>
+
+# Verify data after the test has been "shot"
+<verify>
+<protocol crlf="yes">
+GET https://localhost:%HTTP3PORT/path/%TESTNUMBER0001 HTTP/1.1
+Host: %HOSTIP:%HTTPPORT
+Accept: */*
+Via: 3 nghttpx
+
+GET https://localhost:%HTTP3PORT/path/%TESTNUMBER0002 HTTP/1.1
+Host: %HOSTIP:%HTTPPORT
+Accept: */*
+Via: 3 nghttpx
+
+GET https://localhost:%HTTP3PORT/path/%TESTNUMBER0003 HTTP/1.1
+Host: %HOSTIP:%HTTPPORT
+Accept: */*
+Via: 3 nghttpx
+
+GET https://localhost:%HTTP3PORT/path/%TESTNUMBER0004 HTTP/1.1
+Host: %HOSTIP:%HTTPPORT
+Accept: */*
+Via: 3 nghttpx
+
+</protocol>
+<strip>
+^Host:.*
+</strip>
+<file name="log/stderr%TESTNUMBER" mode="text">
+* Connection #0 to host localhost left intact
+* Connection #0 to host localhost left intact
+* Connection #0 to host localhost left intact
+* Connection #0 to host localhost left intact
+</file>
+<stripfile>
+$_ = '' if (($_ !~ /left intact/) && ($_ !~ /Closing connection/))
+</stripfile>
+</verify>
+</testcase>