Log Message:
Changes 2.16:
* docs: help screen & man page
* docs: add missing full-html flag
* headers: include-what-you-use fixes
* other: free backup ranges
* prepare_memory bug: initialization missing
* licensing: use FreeBSD license (was GNUv3)
* parse_leases: exit at read error
* getdata: realloc instead of asserting
* getdata: potential overflow due unit change
* bug: use uint32_t for IP numbers
* analyze: use more logical variable names
* getdata: initialize memory
* all: include-what-you-see fixes
* analyze: debugging leftover removed
* THANKS: add Ahmed AL Dakhil
* maint: coding style fixes
* output: change to full html behaviour
* build-sys: autotools configure.ac update
* docs: NEWS update
* docs: remove version from manual page
* licensing: set placeholder properly
* bug: use uint32_t for IP numbers
* build-sys: ignore gprof & gcov files
* getdata: new xstrstr function for performance
* other: fix two warnings
* build-sys: update news for release v2.16