We want to have the defacto standard syntax for labels ("L:" instead of "label L;"),
and fix some known bugs, before we enable this again.
The code is left intact (#ifdef'ed SP_GOTO) and the test cases are kept in
sp-goto.test, for the future...
Added feature to disable tests from a list in a file "disabled.def"
Moved down the code that disables, so that --do-test and --start-from
don't list the disabled tests not in range.
disabled.def:
List of test cases to temporarely disable