Map the Shift+F7 to displaying how many processes are currently running

1. Modify the "dmp.c" file (/usr/src/servers/is/dmp.c). Find the struct hook_entry.

   Add one hook entry (e.g. {SF7, pscount_dmp, "Display how many processes are running" }) into it.

2. Modify the "dmp_kernel.c" file (/usr/src/servers/is/dmp_kernel.c).

   Add the pscount_dmp function into it. Add include "../pm/mproc.h".

3. Modify the "proto.h" file (/usr/src/servers/is/proto.h). Add "void pscount_dmp(void);" to it

4. cd /usr/src

5. make build

6. reboot

7. Try to press Shfit+F5, and Shift+F7 :)