[PATCH] Use $HOME/.passrc for configuration purpose

[Reed Wade]

Hello !

I think that you could wrap pass in a script that would load this file
instead of adding this resposibility to pass itself.

~/bin/pass

```
#!/bin/sh

export $(cat "$HOME/.passrc"| xargs -d "\n")
exec /usr/bin/pass
```

But I guess you'd prefer to not have to configure anything or have any wrapper
as you'd like to let pass handle it by itself.