Remove prototypes for functions removed 10+ years ago. Return types should be on
their own lines.

Diffs from Martin Vahlensiech via tech@. Thanks!

Switch from old errwarn.c logging to shiny new log.[ch].

ok benno@

Eliminate #include inside *.h files and include only needed headers in
each *.c file.

Inspired by mention of header silliness by Edgar Pettijohn and mmcc@
on tech@.

Wrappers around a wrapper around free() are of no more use than
wrappers around wrappers around calloc().

The purpose of the free() wrapper is to generate an error message
when free'ing NULL. But fr

Wrappers around a wrapper around free() are of no more use than
wrappers around wrappers around calloc().

The purpose of the free() wrapper is to generate an error message
when free'ing NULL. But free_hash_bucket(), free_lease(), and
free_tree() are all called immediately after dereferencing the
pointer to be freed. Thus the error message will never be issued.

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A slightly more complex calloc() wrapper wrapper, new_hash_table(),
bites the dust.

Single-use wrapper functions that just call a wrapper function
around calloc() and end up producing duplicate error messages are
just confusing.

Eliminate new_hash_bucket(), new_lease(), new_leases(

Single-use wrapper functions that just call a wrapper function
around calloc() and end up producing duplicate error messages are
just confusing.

Eliminate new_hash_bucket(), new_lease(), new_leases(), new_group().

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avoid aliasing with libc functions; ok henning

more crap bites the dust

may the whacking begin