Issue 87 in svnbook: ch06: mention 'htdigest' tool when mentioning digest auth

[svnbook at googlecode.com]

Comment #20 on issue 87 by cmpil... at gmail.com: ch06: mention 'htdigest'  
tool when mentioning digest auth
http://code.google.com/p/svnbook/issues/detail?id=87

You are *killing* me with inconsistency 'svn diff' roots, man!  (The  
typical project recommendation is to perform all diffs from the root of the  
branch, in this case the /trunk directory itself.)  Still, I appreciate the  
patches, so this is only a half-complaint. :-)