fix install instructions

README.rst

@@ -42,11 +42,10 @@ varnish and `vmod_blobdigest`_ as it requires internal interfaces.
 Usage::
 
  export VARNISHSRC=/path/to/your/varnish/sources
- ./autogen.sh
- ./configure
+ ./bootstrap
 
 If you have installed Varnish to a non-standard directory, call
-``autogen.sh`` and ``configure`` with ``PKG_CONFIG_PATH`` pointing to
+``autogen.sh`` and ``bootstrap`` with ``PKG_CONFIG_PATH`` pointing to
 the appropriate path. For instance, when varnishd configure was called
 with ``--prefix=$PREFIX``, use
 
@@ -56,8 +55,8 @@ with ``--prefix=$PREFIX``, use
  export ACLOCAL_PATH=${PREFIX}/share/aclocal
 
 The module will inherit its prefix from Varnish, unless you specify a
-different ``--prefix`` when running the ``configure`` script for this
-module.
+different ``--prefix`` when running the ``bootstrap`` or ``configure``
+scripts for this module.
 
 Make targets: