ikiwiki - information disclosure

Josh Triplett discovered that the blacklist for potentially harmful TeX
code of the teximg module of the Ikiwiki wiki compiler was incomplete,
resulting in information disclosure.

The old stable distribution (etch) is not affected.

For the stable distribution (lenny), this problem has been fixed in
version 2.53.4.

For the unstable distribution (sid), this problem has been fixed in
version 3.1415926.

We recommend that you upgrade your ikiwiki package.