[HACKERS] Why is get_cheapest_parallel_safe_total_inner() in pathkeys.c?

This probably ended up here because there's a bunch of other functions
named get_cheapest* in that file, but all of those relate to getting a
path for specific PathKeys. get_cheapest_parallel_safe_total_inner()
does not do that.

Maybe allpaths.c is a better home for it?

It seems to have been added in [1]

[1] https://git.postgresql.org/gitweb/?p=postgresql.git;a=commit;h=a71f10189dc10a2fe422158a2c9409e0f77c6b9e

-- David Rowley                   http://www.2ndQuadrant.com/PostgreSQL Development, 24x7 Support, Training & Services