If PATH doesn't allow id to be found, add the basics to it

[htInEdin]

A non-empty PATH may still not include e.g. /usr/bin. This patch fixes that.

The need for this arises when using Cygwin but invoking keychain from a Windows context, in which case the PATH is not empty but lacks Cygwin paths.

[mrl5]

hello, @htInEdin - first of all thank you for the PR and sorry that someone responded after ~1 year

the reason why your PR didn't get any attention is that this is a mirror repository.

Funtoo Linux contribution process happens via https://code.funtoo.org

if you're still interested in contributing to Funtoo Linux you might be interested in this links:

• https://www.funtoo.org/Welcome
• https://www.youtube.com/watch?v=V6PfB64oMWo&list=PL2YVrx9jFJOd8aBrJBbXPir8zCMcK3Ip8&index=4
• https://www.funtoo.org/Development_Guide