a separate file rather than directly in icudata.so to avoid the symbol
size warnings from ld.so.
As this data file is needed at runtime, provide a subpackage containing
a second copy installed under /var/www for use with chrooted web
applications (notably php-intl) that use icu4c. (Applications using
chroot jails other than /var/www will need a further copy of the data
file).
Feedback/ok ajacoutot@, bumps to follow.
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