remove a few NULL-checks before free()

More style improvement and removal of NULL/allocation casts.

ok tb@

A few more NULL casts and style tweaks. No functional change.

Cleanup and modernization. No functional change. Discussed with halex@.

Remove more needless casts of NULL and allocations.

Remove casts of allocations and NULL. There are a *ton* of these to
remove in libkeynote, but I'm doing it in small chunks so I don't slip
up.

Previously discussed and approved on the lists, althoug

Remove casts of allocations and NULL. There are a *ton* of these to
remove in libkeynote, but I'm doing it in small chunks so I don't slip
up.

Previously discussed and approved on the lists, although I backed off
after making a dumb mistake in a mega-diff.

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Remove memory.h includes.

ok deraadt@

obvious reallocarray()

fairly simple unsigned char casts for ctype
ok krw

remove wrong free() after realloc().

ok miod millert markus

Header cleanup.
ok hshoexer@

Make crufty configure stuff go away. Remove all unused code paths.
No change in binaries.

ok millert@ deraadt@ hshoexer@

Use snprintf instead of sprintf; deraadt@ OK

with or without fee; received mail permitting this change from angelos

Sync.

Sync again (remove unneeded RAND_set calls).

Sync.

Fix some compile warnings.

Really find the requested assertions, and fix authorizer retrieval.

Plug a minor memory leak associated with kn_get_licensees(), and make
the latter work before a query has been issued.

sync

Roll back yesterday's commit, will wait until after 2.6.

Move all ifdefs in header.h (instead of keynote.h), include header.h
in all files including keynote.h, update manpage.

Better handling of errors in kn_query, update manpage accordingly.

Make some of the perror() calls more informative, correct some
inconsistencies in the man page and the query tool, update the
testsuite accordingly.