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
If Retry-After: specifies a period that is longer than what fits within
--retry-max-time, then stop retrying immediately.
Added test 366 to verify.
Reported-by: Kari Pahula
Fixes#7675Closes#7676