fix conflict specification included in module files

fix conflict specification included in module files (see #994), base it on short module name obtained from active module naming scheme

this forced me to resort to another solution for verifying toolchain definitions vs the loaded toolchain module, since this basically means we can no longer obtain the (isolated) software name from a given module file (keeping in mind that a custom module naming scheme may be embedded a software name in some weird way)

the inner function `tc_elem_present` now using a regex to check whether a module name *could* be for a software package with the specified name, which is the best I can come up with

this approach should work most of the time, but it possible to come with a (weird) module naming scheme that breaks the assumptions made in `tc_elem_present`...
you need to document this new requirement for the `mns`: it has to be possible that given the software name and the short_module_name, it has to be possible to test (without reading the module file? (is this true btw, eg when the module still needs to be created?)) that the short_module_name is the short_module_name for that name.
also: add a warning for nameclashes (or other false positives). (eg when using lowercase-only modulenames).