Can't install because mod_realdoc.la is missing

I found the README installation instructions a bit misleading.

As written, the README seemed to imply that "make install" was equivalent to doing both apxs commands, not just the second one:

Compile and install with:

    apxs -c mod_realdoc.c
    sudo apxs -i -a -n realdoc mod_realdoc.la

or just

    make install

