Update LINGUAS explanation to the last version we had in autotools

po/CMakeLists.txt

@@ -1,10 +1,12 @@
 add_subdirectory(glossary)
 
-# Set of available languages.
+# Set of available languages:
+# * managed at the Translation Project (TP):
 set (TP_LINGUAS az ca cs da eu fa ja nl rw sk sr sv tr uk zh_CN)
-# already marked as external at TP:
+# * already marked as external at TP:
 set (GC_LINGUAS ar bg de el en_GB es fi fr gu he hi hu it kn ko lt lv mr nb ne pl pt pt_BR ro ru ta te ur vi zh_TW)
-# not marked or no TP team:
+# * New or unmarked: The release manager should announce them to TP 
+# and when listed there move in the respective group above.
 set (NEW_LINGUAS as brx doi es_NI kok kok@latin ks mai mni mni@bengali)
 
 set (ALL_LINGUAS ${TP_LINGUAS} ${GC_LINGUAS} ${NEW_LINGUAS})