security: add mirrors

Author: avindra

src/prim/security.md

@@ -7,7 +7,7 @@ Papers from other folks associated with the labs are available more specifically
 
 * 1978: [On the Security of UNIX](http://www.tom-yam.or.jp/2238/ref/secur.pdf) ([html](https://www.mirbsd.org/htman/i386/manSMM/16.security.htm))
   * by Dennis Ritchie
-* 1984: [Reflections on Trusting Trust](https://www.cs.cmu.edu/~rdriley/487/papers/Thompson_1984_ReflectionsonTrustingTrust.pdf) ([HTML](https://www.win.tue.nl/~aeb/linux/hh/thompson/trust.html))
+* 1984: [Reflections on Trusting Trust](https://www.cs.cmu.edu/~rdriley/487/papers/Thompson_1984_ReflectionsonTrustingTrust.pdf) ([HTML](https://www.win.tue.nl/~aeb/linux/hh/thompson/trust.html)) ([HTML mirror](http://cm.bell-labs.co/who/ken/trust.html)) ([markdown](https://github.com/johnmartinez/interesting-finds/blob/main/thompson_trusting_trust/Thompson_Trusting_Trust.md)) ([mirror](https://users.ece.cmu.edu/~ganger/712.fall02/papers/p761-thompson.pdf))
   * by Ken Thompson
   * [2021 overview](https://www.youtube.com/watch?v=SJ7lOus1FzQ) [by Brailsford](https://www.nottingham.ac.uk/news/expertiseguide/computer-science-/professor-david-brailsford-.aspx)
 * 1984: [UNIX Operating System Security](https://people.engr.ncsu.edu/gjin2/Classes/246/Spring2019/Security.pdf) ([DOI](https://doi.org/10.1002/j.1538-7305.1984.tb00058.x))