[packages/grep] - move from GREP_OPTIONS environmental variable to alias due to its obsolescence

[Adam Osuchowski]

Elan Ruusamäe wrote:
> i totally dislike such alias being enabled by default. i have my own, and 
> this one will ovewrite mine (because it's after entry in shrc.d)

Really? Since when ~/.bashrc, ~/.zshrc, etc. is interpreted _before_
/etc/shrc.d? If you don't like system aliases unalias them or redefine
in startup scripts.