Change DDB show prison: - name some columns more closely to the user space variables,   as we do for host.* or allow.* (in the listing) already. - print pr_childmax (children.max). - prefix hex values with 0x.
Change DDB show prison:
- name some columns more closely to the user space variables,
  as we do for host.* or allow.* (in the listing) already.
- print pr_childmax (children.max).
- prefix hex values with 0x.

MFC after:	3 weeks

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase