PATCH: teach diag.t new warning function names

PATCH: teach diag.t new warning function names

A number of function names that do warnings have been added, but diag.t
hasn't kept up.

This patch changes it to look for likely function names in embed.fnc, so
it will automatically keep up in the future.  There's no need to worry
about it looking for inappropriate functions, as the syntax of messages
that it looks for is so restrictive, that there won't be false
positives.  Instead there are still many messages it fails to catch.

As a result of it's falling behind several issues have crept in.  I
resolved the couple I thought were clear (including one in a comment;
diag.t doesn't strip comments, but mostly it doesn't matter), and added
the others to the <DATA> section to ignore.
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