Remove unused uses of -lm and math.h.

configure.in

@@ -26,8 +26,6 @@ AC_CHECK_LIB(socket, socket, [
 SHLIB_LDFLAGS="$SHLIB_LDFLAGS -lsocket"
 LIBS="$LIBS -lsocket"
 ])
-AC_CHECK_LIB(m, ceil, [ SHLIB_LDFLAGS="$SHLIB_LDFLAGS -lm" ])
-
 
 AC_SUBST(SHLIB_SUFFIX_NAME)
 AC_SUBST(SHLIB_LDFLAGS)

src/session.c

@@ -44,7 +44,6 @@
 
 #ifdef HAVE_GETTIMEOFDAY
 #include <sys/time.h>
-#include <math.h>
 #endif
 
 #ifdef HAVE_POLL