[translations] Merge 3 pot files to one.

[Christian Edelmann]

Hello Translators!

Eduin Yezid Carrillo Vega has added a .pot file for my contrib module
called "onlinestatus".
Thank You very much! (mucho Gracias).
Now i had to fix some typos in my module, some t() strings have changed
and i need to generate a new .pot file.
I tried the extract.php file, but that gave me 3 .pot files general.pot,
onlinestatus-module.pot and messengers-inc-php.pot.
The Translator's guide suggest to have one modulename.pot file in the
module/po folder.

I there a method to merge this 3 files to one .pot file?
Can i do a simple "cat onlinestatus-module.pot global.pot
messngers-inc-php.pot > po/onlinestatus.pot", or will this result in
strange behaviour?
Any suggestions?

Greetings

Christian Edelmann.