Added point 100 h) support for multiple libRootDirs for finding hdllib.cfg files.

tools/hdltool_readme.txt

@@ -523,6 +523,13 @@ g) regression test script
    The tests can be identified by the values of some test_* or verify_* key. The pure VHDL test benches could be 
    purphaps also be regarded as a special case of the Pyhton MM - VHDL tests, ie. as a test without MM.
 
+h) multiple libRootDirs for finding hdllib.cfg files
+   Currently hdlib.cfg files are search from one rootDir by find_all_dict_file_paths() in common_dict_file.py. It
+   would be usefule to be able to specify multiple rootDirs for the search path. This allows finding eg. all
+   hdllib.cfg in two different directory trees without having to specifiy their common higher directory root which
+   could be a very large tree to search through. Furthermore by being able to specify the rootDirs more precisely
+   avoids finding unintended hdllib.cfg files.
+  
   
       
 101) More ideas