[PROPOSAL] Fallback if extension not in PASSWORD_STORE_EXTENSIONS_DIR.

[Karl Fogel]

In current 'pass' [1], if the PASSWORD_STORE_EXTENSIONS_DIR 
environment variable is set, then pass won't look in 
~/.password-store/.extensions/ for extensions at all.

Is that the desired behavior?

Here is the behavior that I expected instead:

If the env var is set, then pass would look for EXT_NAME.bash in 
${PASSWORD_STORE_EXTENSIONS_DIR} first.  But if the extension is 
not there (or if the directory doesn't exist at all), then pass 
would *next* try ~/.password-store/.extensions/EXT_NAME.bash 
(which is what pass defaults to if PASSWORD_STORE_EXTENSIONS_DIR 
is unset in the first place).

I'd be happy to submit a patch to implement this behavior.  But 
first I wanted to ask if there would even be interest in such a 
patch.

Thoughts?

Best regards,
-Karl

[1] As of commit b5e965a838b.