[Png-mng-security] libpng-1.0.43rc01 and libpng-1.2.35rc01 available

[glennrp at comcast.net]

libpng-1.0.43rc01 is available at
http://www.simplesystems.org/users/glennrp/sbo/lp1043r01
and libpng-1.2.35rc01 is available at
http://www.simplesystems.org/users/glennrp/sbo/lp1235r01

There are no changes from beta03.

Glenn