moved retry logic into multi instead of the connection itself

Update tests/data/Makefile.am

Co-authored-by: Viktor Szakats <vszakats@users.noreply.github.com>

Apply suggestions from code review

whitespace stuff

Co-authored-by: Viktor Szakats <vszakats@users.noreply.github.com>

more whitspace fixes

more docs changed

pull request fixes

(note that CI requires that symbols-in-versions be something that it should not be)

moving to new curl version

better documentation

try and see maybe  async is destroyed properly now?

removed whitespace

Co-authored-by: Viktor Szakats <vszakats@users.noreply.github.com>

Update docs/libcurl/opts/CURLOPT_ALTSVC_CTRL.md

"-" uses insteadvof space

Co-authored-by: Viktor Szakats <vszakats@users.noreply.github.com>

better handeling of the recovering and checking whether or not to recover

docs/libcurl/opts/CURLOPT_ALTSVC_CTRL.md

@@ -55,7 +55,12 @@ Setting any bit enables the alt-svc engine.
 If the connection fails when trying to connect to an alternative host,
 the hostname from the URL is attempted instead.
 
-Failed connection problems that trigger this fallback include: ...
+Failed connection problems that trigger this fallback:
+1. bad addresses such as .onion
+2. non-responsive servers
+3. bad SSL
+4. unsupported protocols
+5. response appears to be the wrong protocol
 
 ## CURLALTSVC_READONLYFILE
 

docs/libcurl/symbols-in-versions

@@ -199,7 +199,7 @@ CURLALTSVC_H1                   7.64.1
 CURLALTSVC_H2                   7.64.1
 CURLALTSVC_H3                   7.64.1
 CURLALTSVC_READONLYFILE         7.64.1
-CURLALTSVC_NO_RETRY             8.14.0
+CURLALTSVC_NO_RETRY             8.15.0
 CURLAUTH_ANY                    7.10.6
 CURLAUTH_ANYSAFE                7.10.6
 CURLAUTH_AWS_SIGV4              7.75.0