Noteworthy changes in version 1.15.1 (2021-01-08)
* Fix another bug in the secret key export. [T5046]
* Make listing of signatures work if only secret keys are listed. [T3580]
* Fix build problem on FreeBSD. [rMa6220adf30]
* qt: Avoid empty "rem@gnupg.org" signature notations. [T5142]
* python: Fix key_export functions. [T5149]
(previous release: T5131)