US 269-406 [dcl.fct.def.replace] Add "replaceable function" to the index

[wg21bot]

If the new notion of "replaceable" is not removed from the Standard, then it should be listed in the Index under "replaceable," which currently lists only the old meaning.

Proposed change:

Index, page 2480:
Replace: replaceable, 240
with: replaceable, class, 306 function, 240 type, 80

[jensmaurer]

Accepted with modifications.

An index entry for "function, replaceable" and an index cross-reference from "replaceable function" to "function, replaceable" were added.