[Patch] add '-C store-dir' option to switch password store dir

[lio at lunesu.com]

Ah, hadn’t installed the man pages, but I did bother to add the -C option to the CLI usage in my diff ;)

============================================
= pass: the standard unix password manager =
=                                          =
=                  v1.7.4                  =
=                                          =
=             Jason A. Donenfeld           =
=               Jason at zx2c4.com            =
=                                          =
=      http://www.passwordstore.org/       =
============================================

Usage: password-store.sh [-C store-dir] command [args...]
...

> On 31 Jan 2019, at 13:11, Reto Brunner <brunnre8 at gmail.com> wrote:
> 
> On Thu, Jan 31, 2019 at 10:32:23AM +0800, lio at lunesu.com wrote:
>> Correct, but that env var is not obvious until looking at the code and the ‘-C dir’ option is not uncommon for other tools (like git, tar). 
> 
> Why would you want to look at the code?
> `man pass` scroll down to the ENVIRONMENT VARIABLES section.
> So in the end the exact same effort as having some flag, you'd need to read the manpage in any case ;)
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