tool: use errorf() for error output

Convert a number of fprintf() calls.

tool: remove newlines from all helpf/notef/warnf/errorf calls

Make voutf() always add one.

Closes #11226

tests/servers.pm: pick unused port number with a server socket

This change replaces the previous method of picking a port number at
random to try to start servers on, then retrying up to

tests/servers.pm: pick unused port number with a server socket

This change replaces the previous method of picking a port number at
random to try to start servers on, then retrying up to ten times with
new random numbers each time, with a function that creates a server
socket on port zero, thereby getting a suitable random port set by the
kernel. That server socket is then closed and that port number is used
to setup the actual test server on.

There is a risk that *another* server can be started on the machine in
the time gap, but the server verification feature will detect that.

Closes #11220

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RELEASE-NOTES: synced

bump to 8.2.0

configure: fix run-compiler for old /bin/sh

If you try to assign and export on the same line on some older /bin/sh
implementations, it complains:

```
$ export "NAME=value"

configure: fix run-compiler for old /bin/sh

If you try to assign and export on the same line on some older /bin/sh
implementations, it complains:

```
$ export "NAME=value"
NAME=value: is not an identifier
```

This commit rewrites run-compiler's assignments and exports to work with
old /bin/sh, splitting assignment and export into two separate
statements, and only quote the value. So now we have:

```
NAME="value"
export NAME
```

While we're here, make the same change to the two supporting
assign+export lines preceeding the script to be consistent with how
exports work throughout the rest of configure.ac.

Closes #11228

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circleci: install impacket & wolfssl 5.6.0

Closes #11221

tool_urlglob: use curl_off_t instead of longs

To handle more globs better (especially on Windows)

Closes #11224

scripts: Fix GHA matrix job detection in cijobs.pl

The parsing is pretty brittle and it broke detecting some jobs at some
point. Also, detect if Windows is used in GHA.

runtests: abort test run after failure without -a

This was broken in a recent refactor and test runs would not stop.

Follow-up to d4a1b5b6

Reported-by: Daniel Stenberg

runtests: abort test run after failure without -a

This was broken in a recent refactor and test runs would not stop.

Follow-up to d4a1b5b6

Reported-by: Daniel Stenberg
Fixes #11225
Closes #11227

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RELEASE-NOTES: synced

8.1.2 release

THANKS: contributors from 8.1.2

lib1560: verify more scheme guessing

- on 2nd level domains
- on names without dots

As mentioned in #11161, "imap.com" will be guessed IMAP

Closes #11219

page-header: minor wording polish in the URL segment

Closes #11217

page-header: mention curl version and how to figure out current release

Closes #11216

RELEASE-NOTES: synced

configure: without pkg-config and no custom path, use -lnghttp2

Reported-by: correctmost on github
Fixes #11186
Closes #11210

curl: cache the --trace-time value for a second

- caches HH:MM:SS computed and reuses it for logging during
the same second.
- common function for plain log line start formatting

curl: cache the --trace-time value for a second

- caches HH:MM:SS computed and reuses it for logging during
the same second.
- common function for plain log line start formatting

Closes #11211

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libcurl.m4: remove trailing 'dnl' that causes this to break autoconf

Closes #11212

http3: send EOF indicator early as possible

- ngtcp2 and quiche implementations relied on the DONE_SEND event
to forward the EOF for uploads to the libraries. This often
result i

http3: send EOF indicator early as possible

- ngtcp2 and quiche implementations relied on the DONE_SEND event
to forward the EOF for uploads to the libraries. This often
result in a last 0 length EOF data. Tracking the amount of
data left to upload allows EOF indication earlier.
- refs #11205 where CloudFlare DoH servers did not like to
receive the initial upload DATA without EOF and returned
a 400 Bad Request

Reported-by: Sergey Fionov
Fixes #11205
Closes #11207

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scripts/contri*sh: no longer grep -v ' '

Originally these scripts filtered out names that have no space so that
they better avoid nick names not intended for credits. Such names are

scripts/contri*sh: no longer grep -v ' '

Originally these scripts filtered out names that have no space so that
they better avoid nick names not intended for credits. Such names are
not too commonly used, plus we now give credit even to those.

Additionally: non-latin names, like Asian, don't have spaces at all so
they were also filtered out and had to be manually added which made it
an error-prone operation where Asian names eventually easily fell off by
mistake.

Closes #11206

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cf-socket: restore Curl_sock_assign_addr()

Regression since it was not private. Also used by msh3.c

Follow-up to 8e85764b7bd7f05f5
Reported-by: Gisle Vanem
Fixes #11202

cf-socket: restore Curl_sock_assign_addr()

Regression since it was not private. Also used by msh3.c

Follow-up to 8e85764b7bd7f05f5
Reported-by: Gisle Vanem
Fixes #11202
Closes #11204

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RELEASE-NOTES: synced

Taken down to 8.1.2 now for pending patch release

libssh: when keyboard-interactive auth fails, try password

The state machine had a mistake in that it would not carry on to that
next step.

This also adds a verbose output what

libssh: when keyboard-interactive auth fails, try password

The state machine had a mistake in that it would not carry on to that
next step.

This also adds a verbose output what methods that are available from the
server and renames the macros that change to the next auth methods to
try.

Reported-by: 左潇峰
Fixes #11196
Closes #11197

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configure: fix build with arbitrary CC and LD_LIBRARY_PATH

Since ./configure and processes that inherit its environment variables
are the only callers of the run-compiler script, we can

configure: fix build with arbitrary CC and LD_LIBRARY_PATH

Since ./configure and processes that inherit its environment variables
are the only callers of the run-compiler script, we can just save the
current value of the LD_LIBRARY_PATH and CC variables to another pair of
environment variables, and make run-compiler a static script that
simply restores CC and LD_LIBRARY_PATH to the saved value, and before
running the compiler.

This avoids having to inject the values of the variables in the script,
possibly causing problems if they contains spaces, quotes, and other
special characters.

Also add exports in the script just in case LD_LIBRARY_PATH and CC are
not already in the environment.

follow-up from 471dab2

Closes #11182

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urlapi: remove superfluous host name check

... as it is checked later more proper.

Closes #11195