pytest: use dante-server in CI

- add startup check for 'danted' to avoid fails on low cpu
- rename 'sockd' to 'danted' everywhere to clarify what we use
- add proper defaults for 'danted' for debian
- install 'dante-server' in pytest ci runs

Closes #18075

docs/INSTALL-CMAKE.md

@@ -460,7 +460,7 @@ Details via CMake
 - `CADDY`:                                  Default: `caddy`
 - `HTTPD_NGHTTPX`:                          Default: `nghttpx`
 - `HTTPD`:                                  Default: `apache2`
-- `SOCKD`:                                  Default: `sockd`
+- `DANTED`:                                 Default: `danted`
 - `TEST_NGHTTPX`:                           Default: `nghttpx`
 - `VSFTPD`:                                 Default: `vsftps`
 

docs/internals/SCORECARD.md

@@ -54,8 +54,8 @@ Similar options are available for uploads and requests scenarios.
 
 ## sockd
 
-If you have configured curl with `--with-test-sockd=<sockd-path>` for a
-`dante sockd` server installed on your system, you can provide the scorecard
+If you have configured curl with `--with-test-danted=<danted-path>` for a
+`dante-server` installed on your system, you can provide the scorecard
 with arguments `--socks4` or `--socks5` to test performance with a SOCKS proxy
 involved. (Note: this does not work for HTTP/3)
 

docs/tests/HTTP.md

@@ -52,7 +52,7 @@ Via curl's `configure` script you may specify:
   * `--with-test-httpd=<httpd-install-path>` if you have an Apache httpd installed somewhere else. On Debian/Ubuntu it will otherwise look into `/usr/bin` and `/usr/sbin` to find those.
   * `--with-test-caddy=<caddy-install-path>` if you have a Caddy web server installed somewhere else.
   * `--with-test-vsftpd=<vsftpd-install-path>` if you have a vsftpd ftp  server installed somewhere else.
-  * `--with-test-sockd=<dante-sockd-path>` if you have `dante sockd` server installed
+  * `--with-test-danted=<danted-path>` if you have `dante-server` installed
 
 ## Usage Tips