confirmed to work with "g++ (GCC) 4.2.1 20070719  [FreeBSD]"
confirmed to work with "g++ (GCC) 4.2.1 20070719  [FreeBSD]"

this will only last until I feel inclined to use a c++0x feature
such as "auto".  on the other hand, that could mean "forever"
since to requirements are tiny and the code trivial as is.

used `make _CXXRT=/usr/lib GCCVER=` to build with above-mentioned
compiler on FreeBSD-8.0

* Makefile

  allow setting _CXXRT on the command line

roman-neuhauser/maildirs