- Style(9) improvements. - Convert all K&R definitions to ANSI equialents. - Retire bsd_malloc and bsd_free macros and   use malloc/free directly. - Drop some unused debugging calls.
- Style(9) improvements.
- Convert all K&R definitions to ANSI equialents.
- Retire bsd_malloc and bsd_free macros and
  use malloc/free directly.
- Drop some unused debugging calls.

This commit brings no functional changes.

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