Imported Upstream version 2.1.1
Merge tag 'upstream/2.1.1'

Upstream version 2.1.1
Droping all patches taken from upstream 'maint' branch
- 10_check_apt_fix_memset.dpatch
- 10_check_ntp_null_termination.dpatch
- 10_check_real_null_termination.dpatch
- 10_check_tcp_fix_help_escape.dpatch
- 11_check_ntp_revert_n-p_coverty_fix.dpatch
- 12_check_ntp_null_termination_jitter.dpatch
Prepare release