build: Remove substitution of *_OBJ variables Remove substitution of *_OBJ variables (e.g. POPT_OBJ or PCRE_OBJ) from configure scripts as they don't seem to be set or used by anything. Reviewed-by: Jakub Hrozek <jhrozek@redhat.com>

Raise the required version of libdhash libdhash version 0.4.2 is required because older versions cannot update hash entries.

Rewrite toplevel Makefile There is no longer a need to have nested Makefiles and configure scripts. This patch combines the src/ Makefile and configure.ac into the root.

Rename server/ directory to src/ Also update BUILD.txt