Configure flags and universal variants

Hi all, Trunk contains new code for configure flags and default universal variant code. It would be great if this could be tested more and released as soon as possible: - it would allow maintainers to work on universal variants - it would allow us to simplify many portfiles by removing: configure.env CFLAGS=-I${prefix}/include LDFLAGS=-L${prefix}/lib Besides, trunk code produces -O2 binaries for autoconf-based ports, while any such port with the previous line is compiled -O0 with 1.4.0. Paul