Support full POSIX-style time zone: EST+3, PST-3, etc.

Thomas G. Lockhart <lockhart@fourpalms.org>

Commit: 90c4bab7ea55de6510ab25521372d90dd07bbc57
Author: Thomas G. Lockhart <lockhart@fourpalms.org>
Date: 2000-03-16T14:38:31Z
Releases: 7.1.1
Support full POSIX-style time zone: EST+3, PST-3, etc.
We probably support a superset of the spec, but I don't have the spec
 to confirm this.
Update regression tests to include tests for this format.
Update geometry.out with results from Linux RH 5.2 system
(for last decimal place).

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