consistency with all other gdb files.
* cadillac.c: Use <string.h> rather than <strings.h>.
* cadillac.c (kernel_dispatch): Convert rindex usage to strrchr.
* Makefile.in (MAKE): Remove definition for consistency with
other Makefile.in files and to fix problem with recursive makes.
* Use prototypes for all interface routines (fix bugs found as a result of
doing so).
* Make full_filename more robust in the face of null dirname/filenames.
* Get pty at startup instead of at child creation time. Put GDB descriptors
0, 1 and 2 on it so that we can see the output of shell commands.
* Get rid of prompt(), use print_prompt() instead. Fixes loads of stupid
prompting problems.
