Include example of new 'not_biotypes' option.

misc-scripts/id_mapping/default.conf

@@ -40,8 +40,10 @@ targetdbname                = sf7_patch_pa_62
 build_cache_auto_threshold  = 2000
 build_cache_concurrent_jobs = 25
 
-;; limit on biotypes
+;; include only some biotypes
 ;biotypes=protein_coding,pseudogene,retrotransposed
+;; alternatively, exclude some biotypes
+;not_biotypes=protein_coding,pseudogene,retrotransposed
 
 ;; LSF parameters
 lsf_opt_run_small           = "-q small"