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
- Bug report #1792649 (http://curl.haxx.se/bug/view.cgi?id=1792649) pointed
out a problem with doing an empty upload over FTP on a re-used connection.
I added test case 541 to reproduce it and to verify the fix.
- I noticed while writing test 541 that the FTP code wrongly did a CWD on the
second transfer as it didn't store and remember the "" path from the
previous transfer so it would instead CWD to the entry path as stored. This
worked, but did a superfluous command. Thus, test case 541 now also verifies
this fix.