TODO:
	* Write this README.

BEHAVIOUR OF THIS LIBRARY:
	* This library does not modify the caller's memory.
	* This library does not use malloc() (except in one place, TBF).
	* This library is guaranteed compatible with the Perl Mail::SRS.

SUPPORT:
	* See http://www.libsrs2.org/ where there are much fuller
	  resources documenting SRS and libsrs2.