[Bug localedata/13547] Different strings collate as equal in Hungarian

["egmont at gmail dot com" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=13547

--- Comment #3 from Egmont Koblinger <egmont at gmail dot com> ---
Please note that the patch applied here was incorrect. It fixed a corner case,
while broke a more generic one.

By tokenizing "ssz" as <s_or_sz><sz> rather than <sz><sz>, and ordering the
tokens as <s> < <s_or_sz> < <sz>, the corner case when the only difference in
the two words is "ssz" vs. "szsz" is fixed.

However, sorting of e.g. "kasza" <k><a><sz><a> vs. "kassza"
<k><a><s_or_sz><sz><a> became broken. The correct ordering would be "kasza" <
"kassza" (since it's actually <k><a><sz><sz><a>), but with the current solution
they're ordered backwards (due to <s_or_sz> preceding <sz>).

The solution is to tokenize both "ssz" and "szsz" as <sz><sz> (as we did
before), but apply something weaker, something along the lines of a "fake
accent" (SINGLE-OR-COMPOUND vs. COMPOUND) on top of them that might distinguish
later.

Let's leave this bug closed. A fix is available in bug 18934.

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