Newer versions of libedit provide an EL_REFRESH mechanism for
redrawing the prompt. We had previously written our own code to
handle this. In theory handing this over to libedit should be better.
Unfortunately when using EL_REFRESH the output of sofia siptrace isn't
showing up. We're working on that, but for now we're just force own
our redrawing code to be used instead.
#ifdef HAVE_LIBEDIT
#include <histedit.h>
+#undef HAVE_DECL_EL_REFRESH
#endif
typedef struct {