pkgupdate :: always dry-run except when 'run' is given

Signed-off-by: BlackEagle <ike.devolder@gmail.com>
update-repo-folder :: run pkgupdate in specific repo folder

Signed-off-by: BlackEagle <ike.devolder@gmail.com>
remove share/update

Signed-off-by: BlackEagle <ike.devolder@gmail.com>