* Declare databridge buffer lengths in LocaleBackend.
* Use strcpy instead of strlcpy when writing to databridge buffers
(this is the first fix for #18598.)
* Check for overflows and error out when they happen.
* Verify that ICU actually knows the timezone in question
and fall back to GMT if it does not (this would also fix that crash.)
Fixes #18598.
e8d328979c