ports/183243: update security/libsodium to 0.4.5

[danilo at FreeBSD.org]

Synopsis: update security/libsodium to 0.4.5

Responsible-Changed-From-To: freebsd-ports-bugs->danilo
Responsible-Changed-By: danilo
Responsible-Changed-When: Thu Oct 24 19:25:41 UTC 2013
Responsible-Changed-Why: 
I'll take it.

http://www.freebsd.org/cgi/query-pr.cgi?pr=183243