replace get_ppid, check_parent_sshd. Add find_in_first_print_second

[antalk2]

#572

• Matching in awk '$1 ~ /'${1:-}'/ { SUM += $2 } END { print SUM } '
  was wrong in both get_ppid and check_parent_sshd.
  It would match a pid 13 (in stdin) to a pid 1 in the query.

• The SUM += $2 in check_parent_sshd tried to sum a text field.

Replaced with checkin equality and just printing $2,
in find_in_first_print_second()

• check_parent_sshd() only checked the direct parent being "sshd"

Changed to also check parent of parent, etc.