Drop use of libedit EL_REFRESH in fs_cli for now

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.

libs/esl/fs_cli.c

@@ -47,6 +47,7 @@ static unsigned char esl_console_complete(const char *buffer, const char *cursor
 
 #ifdef HAVE_LIBEDIT
 #include <histedit.h>
+#undef HAVE_DECL_EL_REFRESH
 #endif
 
 typedef struct {