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Bug 1301383 - Memoize does not work under threaded perl in windows: "Anonymous function called in forbidden scalar context"

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This commit fixes bug #1287265. 
https://bugzilla.mozilla.org/show_bug.cgi?id=1287265

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* tvau-patch-1:
  Bug 1317777 - REST API 1.0 - datetime inputs cause server error

* 'patch-1' of https://github.com/tvau/bugzilla:
  Bug 1317777 - REST API 1.0 - datetime inputs cause server error

* DierickxD71-patch-1:
  Timetrack fields, "Orig Est."+"Hours Left", accept numbers with commas or point

Use datetime_format_inbound from Bugzilla::API::1_0::Util package.

For non-US locales the bug entry/update page shows values with commas as decimal seperator in the timetracking fields "Orig Est." and "Hours Left". However when saving/updating bugzilla refuses these values. (see bug 1122419)
These 2 changed lines let bugzilla accept/process these "comma-values" as "point-values".
This patch *should* not influence systems with US locale.

This reverts commit f1b9ed5d.

Bug 1310728 - editflagtypes.cgi crashes when classifications are enabled and the user hasn't global editcomponents privs
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Bug 1309737 - Add User-Agent to the Access-Control-Allow-Headers header

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