* Get rid of the RCS Header stuff.  They're meaningless in git.
 * Add public domain comment to some of the files if the only comment
   was the RCS header.

.indent.pro.

* backtrace.c, save.c:  fprintf warnings.
* interrupt.h: Declare build_fake_control_stack_frame and
  interrupt_handle_space_overflow.
* os-common.c: Include interrupt.h to define
  build_fake_control_stack_frame.
* parse.c, runprog.c, search.c:  Include some standard system headers
  to get rid of undefined function warnings.

strcmp the name.