Changeset 9d1503d in git for lib/es.po

configure.ac,lib/,src/message.c,src/msvc/config.h.in: Stop trying to
catch and report signals. The only real reason to do it is so we
can say "Bug in program detected! Please report this to the authors"
before we exit, but when the program crashes that's pretty obvious.
In aven we try to pop up a message box for this message, which may
fail due to whatever caused the signal, while with the command line
tools there's no great benefit over just letting the shell report
the signal.