Ordering of libraries changed so that -lbsd is *after* -lm

Fixes a problem Darren reports with AIX, and doesn't seem to break either
FreeBSD or Linux(David?)...

src/configure.in

@@ -341,6 +341,7 @@ AC_CHECK_LIB(termcap,  main)
 AC_CHECK_LIB(history,  main)
 AC_CHECK_LIB(readline, main)
 AC_CHECK_LIB(readline, write_history, AC_DEFINE(HAVE_HISTORY))
+AC_CHECK_LIB(bsd,      main)
 AC_CHECK_LIB(m,        main)
 AC_CHECK_LIB(dl,       main)
 AC_CHECK_LIB(socket,   main)
@@ -350,7 +351,6 @@ AC_CHECK_LIB(IPC,      main)
 AC_CHECK_LIB(lc,       main)
 AC_CHECK_LIB(dld,      main)
 AC_CHECK_LIB(ln,       main)
-AC_CHECK_LIB(bsd,      main)
 AC_CHECK_LIB(ld,       main)
 AC_CHECK_LIB(compat,   main)
 AC_CHECK_LIB(BSD,      main)