Here's a bit of a cleanup of the {configure,Makefile}.in files. I've

Here's a bit of a cleanup of the {configure,Makefile}.in files.  I've
now combined all the ad-hoc AC_SUBST variables into three generalised
ones:

  EXTRA_BIN_PROGS 	Additional programs to install in ${prefix}/sbin
  EXTRA_SBIN_PROGS 	Additional programs to install in ${prefix}/bin
  EXTRA_ALL_TARGETS     Additional targets to build by default
  SHLIB_PROGS           Shared library objects (pam, winbind) to build

We also build some extra stuff by default: the python extensions (if
--with-python specified), smbmount related binaries (if
--with-smbmount specified), and the samba torture suite.

The idea behind this is to have everything that is configured built by
default to detect breakage as soon as possible when people make low
level changes.