[PATCH] sort diacritics left-to-right except in fr_CA locale

[Florian Weimer]

* Alexandre Oliva:

> This fixes a long-standing collation bug in glibc, affecting all locales
> but de_DE, lb_LU and fr_CA.  This led me to write a separate NEWS entry
> for this bug; do we want a bug report in the database regardless?

I wonder if this libc change means that database indexes may have to
be rebuilt.  This:

  <http://www.postgresql.org/docs/current/static/sql-createdatabase.html>

suggests “yes”.  Which means that adopting this change as part of a
system glibc update is quite risky.

I have no idea how to communicate this appropriately.  Maybe we should
ask the PostgreSQL folks about opinions on this matter.