* configure.ac: Setup installation of dll files in $bindir.
(IF_DLL, LIBNETTLE_FILE_SRC, LIBHOGWEED_FILE_SRC): New
substitutions.

* config.make.in (LIBNETTLE_FILE_SRC): Substitute new autoconf
variable.
(LIBHOGWEED_FILE_SRC): Likewise.

* Makefile.in (install-dll-nettle, uninstall-dll-nettle): New
target for installing the dll file in $bindir.
(install-shared-nettle): Conditionally
depend on install-dll-nettle. Use LIBNETTLE_FILE_SRC.
(uninstall-shared-nettle): Conditionally depend on
install-dll-nettle.
(various hogweed targets): Analogous changes.

Rev: nettle/ChangeLog:1.230
Rev: nettle/Makefile.in:1.41
Rev: nettle/config.make.in:1.4
Rev: nettle/configure.ac:1.47