pidgin/pidgin

Port purple_str_to_time to regex and add additional tests
release-2.x.y
2021-09-16, Gary Kramlich
ac6dbd45da27
Port purple_str_to_time to regex and add additional tests

Testing Done:
Ran the unit tests with the normal `./autogen.sh` as well as a setup for fuzzing.

Reviewed at https://reviews.imfreedom.org/r/923/
How to build Pidgin for Windows using MinGW
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For the latest build instructions, please refer to:
http://developer.pidgin.im/wiki/BuildingWinPidgin