BUGFIX: don't try autocleanup inside system dirs

This safety feature addresses #2650 somewhat indirectly.
A list of system directories is defined.  When the uninstall
process encounters a "system directory" it does not touch that
directory at all
- no chmod on that dir
- no search for broken symlinks in that dir
- no cleanup of .DS_Store files in that dir
Explictly listed files from a pkg receipts are not affected by
this change.  Individual files will still be removed, even if
those files are in a special "system directory"
rename seafile.rb

to seafile-client.rb
per naming rules in CONTRIBUTING.md
rename strongvpn.rb

to strongvpn-client.rb
per naming rules in CONTRIBUTING.md
Merge pull request #3331 from rolandwalker/rename_strongvpn

rename strongvpn.rb
Merge pull request #3330 from rolandwalker/rename_seafile

rename seafile.rb
Upgrade Xiami.app to v1.1.6-1747
Merge pull request #3342 from kols/xiami

Upgrade Xiami.app to v1.1.6-1747
Merge pull request #2672 from rolandwalker/lsb_no_delete_safety

BUGFIX: don't try autocleanup inside system dirs
Merge remote-tracking branch 'upstream/master'