Add bytea.h inclusions as needed.  Some of the contrib regression tests
need to be de-hexified, too.  Per buildfarm.

values being complained of.

In passing, also remove the arbitrary length limitation in the similar
error detail message for foreign key violations.

Itagaki Takahiro

provided by Andrew.

than having some whitespace discrepancy.  Although whitespace is supposed
to be ignored in our regression tests, for some reason buildfarm member
spoonbill doesn't like it.

any negative or positive number, not just -1 or 1. Fix comment on
varstr_cmp and citext test case accordingly.

As pointed out by Zdenek Kotala, and buildfarm member gothic moth.

citext-to-and-from-xml tests, since those caused variation between
installations with or without libxml without really proving much.  Instead
repurpose citext_1.out as the expected results in glibc en_US (and probably
other) locales.

pointers.  This is only a whitespace change, which ought to be ignored
by regression testing, but for some reason buildfarm member spoonbill
doesn't like it.

David Wheeler

of the STRING type category, thereby opening up the mechanism for user-defined
types.  This is mainly for the benefit of citext, though; there aren't likely
to be a lot of types that are all general-purpose character strings.
Per discussion with David Wheeler.

by putting it into the standard string category, we cause casts from citext
to text to be recognized as "preferred" casts.  This eliminates the need
for creation of alias functions and operators that only serve to prevent
ambiguous-function errors; get rid of the ones that were in the original
commit.

David E. Wheeler