decide which sed to use based on installed sed rather than os

[Airor4]

#1508

[ravindk89]

@Airor4 thanks for taking the time! I recall us dealing with this a few years back but there's always another monkey with a wrench I suppose.

[Airor4]

@ravindk89 thanks for the quick responses. Happy to contribute :).

Do I need to do the squash and rebase since it's just one commit?

[ravindk89]

Nope, I've got it @Airor4 , just had to look away from this screen for a bit.