Description of the patch:
This update for htmldoc fixes the following issues:
CVE-2021-20308: Fixed crash bug with bad GIFs, ( boo#1184424 )
Fixed license, package is GPL 2+ not LGPL
1.8.28-6.1Exploitability
AV:LAC:LPR:NUI:RScope
S:UImpact
C:NI:NA:L3.3/CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L