Package chrooted: Information

- Added config file installed to %_sysconfdir/chrooted.
- Added support for DISABLE_HARDLINKS config option that makes update_chrooted
  copy files instead of hardlinking.

- Copy: always dereference symbolic links in SOURCE
  (by Alexey Shabalin; closes: #33591).

- Fixes:
  + OVE-20200311-0001 Normal update operations by root can corrupt/crash running processes through modifying libraries

    (Normally, the processes that can be affected are only the services
    already running in the chrooted environment being updated, if it is on
    a different filesystem than the system libraries, and hence they
    can't be hardlinked. Extraordinarily, if a file in a chrooted
    environment has been a hardlink to a system library, but ln hasn't
    succeeded this time for some reason, the affected processes are any
    already running processes system-wide.

    This could happen only as a result of actions initiated by root:
    for example, a package upgrade which included the old version of
    chrooted, or a package upgrade which included libraries in a system
    with the old version of chrooted, or an invocation of
    /sbin/update_chrooted.)