A couple typo fixes, formatting fix for bullets...

...and a proposed end of sentence to one that trailed off:

> There is a misconception that FOSS that is distributed to the public should not be integrated or modified for use in sensitive systems. FOSS is often preferred for use in **sensitive systems. This is due in part to its increased auditability, and in part because security in FOSS must be designed never to rely on obscurity in how the code works.**

Typo fixes: `mainted` - > `maintained`, `meet their need` -> `meet their needs`