pidgin/pidgin

Add some missed docs for PidginCredential*

2021-05-13, Elliott Sales de Andrade
7e8c50c967bc
Add some missed docs for PidginCredential*

* Add `Since` tags for `PidginCredential`.
* Add docs for `PidginCredential*` top-level API.

Testing Done:
Compile

Reviewed at https://reviews.imfreedom.org/r/651/
---
name: python-docutils
buildsystem: simple
build-commands:
- pip3 install --prefix=/app --no-deps .
sources:
- type: archive
url: https://files.pythonhosted.org/packages/2f/e0/3d435b34abd2d62e8206171892f174b180cd37b09d57b924ca5c2ef2219d/docutils-0.16.tar.gz
sha256: c2de3a60e9e7d07be26b7f2b00ca0309c207e06c100f9cc2a94931fc75a478fc