Think-o in foreign key comments

Hello,

I noticed a few places in the new foreign key code where a comment says
"the ON DELETE SET NULL/DELETE clause". I believe it should say "ON
DELETE SET NULL/DEFAULT".

These comments were added in d6f96ed94e7, "Allow specifying column list
for foreign key ON DELETE SET actions." Here is a patch to correct them.
I don't think you usually create a commitfest entry for tiny fixes like
this, right? But if you'd like one please let me know and I'll add it.

Yours,

--
Paul ~{:-)
pj(at)illuminatedcomputing(dot)com