New build system

[Alan DeKok]

Alan Buxey wrote:
> vi src/modules/rlm_pam/all.mk.in
...
> ...however, I then had to edit src/modules/rlm_krb5/rlm_krb5.c
...
> build/lib/.libs/rlm_sql.so: undefined reference to `fr_connection_reconnect'
...
> build/lib/.libs/rlm_perl.so: undefined reference to `boot_DynaLoader'

  All fixed.  Please do "git pull".

  The builds are now ~4s, which is great.  But "configure" still takes
*forever*.  Maybe I'll try fixing that next.

  Alan DeKok.