shells/lshell: update to 0.9.18.20160916

• pass maintainership to submitter
• switch to github
• add NO_ARCH, update project web-page and remove unneded patch

This release fixing some vulnerabilities, that defeats the purpose
of the package entirely, so this is why MFH is requested.

PR: 215989
Submitted by: Damien Fleuriot <dam@my.gd>
MFH: 2017Q1