[trace] simpler tracing interface, just one way to declare categories
details:
- TRACE_category updated to the new way platform file is traced:
user must call TRACE_category *after* platform parsing;
after MSG_create_environment or SD_create_environment (SMPI is ok)
=> such requirement allows the trace mechanism to figure out
where to put the new categories in the traced type hierarchy
- TRACE_create_category killed, allowed the user to create a hierarchy
of categories, but such hierarchy was not reflected in the categorized
resource utilization
git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/simgrid/simgrid/trunk@9168
48e7efb5-ca39-0410-a469-
dd3cf9ba447f
