Cleanup of redundant/useless header file inclusion.
ISC style lint, primarily for function declarations and standalone
comments -- ie, those that appear on a line without any code, which
should be written as follows:
/*
* This is a comment.
*/
isc_file_getmodtime, isc_mktemplate renamed to
isc_file_mktemplate and isc_ufile renamed to
isc_file_openunique. By no means an exhaustive API,
it is just what's needed for now.
