tests: add -q as first option when invoking curl for tests

To reduce the risk that the user running the tests has a .curlrc present
that messes things up.

Support 'option="no-q"' for the <command> tag to switch it off on demand.
Use this new feature in test 433 and 436.

Ref: curl#13284
Closes curl#13387

tests/FILEFORMAT.md

@@ -531,7 +531,7 @@ command has been run.
 If the variable name has no assignment, no `=`, then that variable is just
 deleted.
 
-### `<command [option="no-output/no-include/force-output/binary-trace"] [timeout="secs"][delay="secs"][type="perl/shell"]>`
+### `<command [option="no-q/no-output/no-include/force-output/binary-trace"] [timeout="secs"][delay="secs"][type="perl/shell"]>`
 Command line to run.
 
 Note that the URL that gets passed to the server actually controls what data
@@ -562,6 +562,9 @@ otherwise written to verify stdout.
 Set `option="no-include"` to prevent the test script to slap on the
 `--include` argument.
 
+Set `option="no-q"` avoid using `-q` as the first argument in the curl command
+line.
+
 Set `option="binary-trace"` to use `--trace` instead of `--trace-ascii` for
 tracing. Suitable for binary-oriented protocols such as MQTT.
 

tests/data/test433

@@ -36,7 +36,7 @@ CURL_HOME=
 <name>
 Verify XDG_CONFIG_HOME use to find .curlrc
 </name>
-<command>
+<command option="no-q">
 %HOSTIP:%HTTPPORT/%TESTNUMBER
 </command>
 </client>

tests/data/test436

@@ -35,7 +35,7 @@ XDG_CONFIG_HOME=
 <name>
 Find .curlrc in .config/curlrc via CURL_HOME
 </name>
-<command>
+<command option="no-q">
 %HOSTIP:%HTTPPORT/%TESTNUMBER
 </command>
 </client>

tests/runner.pm

@@ -920,6 +920,9 @@ sub singletest_run {
 
     if(!$tool) {
         $CMDLINE=shell_quote($CURL);
+        if($cmdhash{'option'} !~ /no-q/) {
+            $CMDLINE .= " -q";
+        }
     }
 
     if(use_valgrind() && !$disablevalgrind) {