In Linux, file *.c will output this:
study.c: C source, ISO-8859 text
summary.c: C source, ISO-8859 text
test_eressea.c: C source, ASCII text
Let's make all the source files ASCII. In a lot of cases, that means rewriting German comments to be English, which is also great.
In Atlantis, I use a header called rtl.h to polyfill functions like _strdup and _snprintf. I would like that to be a reusable library that Eressea can use, and eliminate the hacks in platform.h in favor of autoconf-style detections done by CMake (already happening for a few things).