Drop outdated list of options from README, mention configure --help instead

README

@@ -74,31 +74,8 @@ program with our without additional configuration flags.
 Configuration flags
 ===
 
-When using autools the dbus-specific configuration flags that can be given to
-the ./configure program are these 
-
-  --enable-tests             enable unit test code
-  --enable-verbose-mode      support verbose debug mode
-  --enable-asserts           include assertion checks
-  --enable-checks            include sanity checks on public API
-  --enable-xml-docs          build XML documentation (requires xmlto)
-  --enable-doxygen-docs      build DOXYGEN documentation (requires Doxygen)
-  --enable-compiler-coverage compile with coverage profiling instrumentation (gcc only)
-  --enable-abstract-sockets  use abstract socket namespace (linux only)
-  --enable-selinux           build with SELinux support
-  --enable-dnotify           build with dnotify support (linux only)
-  --enable-kqueue            build with kqueue support (*BSD only)
-  --with-xml=libxml/expat           XML library to use
-  --with-init-scripts=redhat        Style of init scripts to install
-  --with-session-socket-dir=dirname Where to put sockets for the per-login-session message bus
-  --with-test-socket-dir=dirname    Where to put sockets for make check
-  --with-system-pid-file=pidfile    PID file for systemwide daemon
-  --with-system-socket=filename     UNIX domain socket for systemwide daemon
-  --with-console-auth-dir=dirname   directory to check for console ownerhip
-  --with-dbus-user=<user>           User for running the DBUS daemon (messagebus)
-  --with-gnu-ld                     assume the C compiler uses GNU ld [default=no]
-  --with-tags[=TAGS]                include additional configurations [automatic]
-  --with-x                          use the X Window System
+When using autotools, run "./configure --help" to see the possible
+configuration options and environment variables.
 
 When using the cmake build system the dbus-specific configuration flags that can be given 
 to the cmake program are these (use -D<key>=<value> on command line)