docs/126590: [patch] Write routine called forever in Sample Echo Pseudo-Device Driver in Architecture Handbook

[eadler at FreeBSD.org]

Synopsis: [patch] Write routine called forever in Sample Echo Pseudo-Device Driver in Architecture Handbook

Responsible-Changed-From-To: freebsd-doc->eadler
Responsible-Changed-By: eadler
Responsible-Changed-When: Wed Nov 14 23:42:06 UTC 2012
Responsible-Changed-Why: 
I can't believe this has sat all this time untaken - take and attempt to
figure out what is going on

http://www.freebsd.org/cgi/query-pr.cgi?pr=126590