Lrzip version 0.660

I finally found the time to give lrzip a long overdue update which I hadn't touched in 4 years. Apologies for my extended absence from this project.

 Get it from here:

 https://github.com/ckolivas/lrzip/tree/v0.660

 This is a maintenance bugfix release for the accumulated issues developed in that time. Many of the fixes are security fixes for potentially maliciously crafted archives, thus it is strongly recommended existing users of lrzip update.

 The brief WHATS-NEW notes summarise the notable changes:

•  Address multiple potential security issues with crafted or corrupt archives.
• Accept password usage as a parameter on decompressing encrypted files.
• Fix CPU detection not respecting affinity.
• Fix segfault with zpaq and incompressible blocks.
• Fix inappropriate warnings being displayed.
• Minor cleanups and extra code sanity checks.