Added myself.

[SVN r24065]

more/blanket-permission.txt

@@ -27,3 +27,4 @@ Brad King (brad.king -at- kitware.com) (See Boost list message of Wed, 21 Jul 20
 Jeremy Siek (jsiek@osl.iu.edu)
 Howard Hinnant (hinnant -at- twcny.rr.com) (See Boost list message of July 25, 2004 3:44:49 PM EST)
 Joel de Guzman (joel -at- boost-consulting.com) (See Boost list message of July 25, 2004 8:32:00 PM EST)
+Vladimir Prus (ghost@cs.msu.su)