This allows users to put one of them in their .curlrc and still easily
use the other one at will in command lines.
The --no-* versions disable both of them.
Reported-by: Mitchell Blank Jr
Fixes#19029Closes#19034
The threee tags `<name>`, `</name>` and `<command>` were frequently used
with a leading space that this removes. The reason this habbit is so
widespread in testcases is probably that they have been copy and pasted.
Hence, fixing them all now might curb this practice from now on.
Closes#12028