Remove the need for autoconf in the debian package

Continuing to try and simplify the build system, calculate the remaining
two autoconf variables from the existing config.mak.

For the moment, leave a configure and configure.ac file in place to
allow any old build systems to continue to function without errors.

.github/workflows/tests.yml

@@ -425,8 +425,6 @@ jobs:
           HOST_TRIPLET=$(dpkg-architecture -a${{ matrix.arch }} -q DEB_HOST_GNU_TYPE)
           ./autogen.sh
           ./configure --host $HOST_TRIPLET
-          cd packages/debian/
-          ./configure EXTN=${{ matrix.arch }}
         # yamllint enable rule:line-length
 
       - name: Build

packages/debian/Makefile.in → packages/debian/Makefile

@@ -4,6 +4,13 @@
 N2N_HOME=$(PWD)/../..
 N2N_BUILD=${N2N_HOME}/packages/debian/n2n
 
+include ${N2N_HOME}/config.mak
+
+# TODO: continue to untangle the version generation
+# we either should not need to override the config.mak here or
+# should never set the version in config.mak and always calculate it
+PACKAGE_VERSION := $(shell ${N2N_HOME}/scripts/version.sh)
+
 all: clean pkg
 
 pkg:
@@ -19,8 +26,8 @@ pkg:
 	install -m644 ../../community.list ${N2N_BUILD}/usr/share/doc/n2n/examples/
 	install -m644 ../../doc/*.md ${N2N_BUILD}/usr/share/doc/n2n/
 	@/bin/rm -f ../n2n*.deb
-	DEBEMAIL=builder@example.com dch -v @N2N_VERSION@ --no-auto-nmu Auto Build
-	dpkg-buildpackage -rfakeroot -d -us -uc -a@EXTN@
+	DEBEMAIL=builder@example.com dch -v ${PACKAGE_VERSION} --no-auto-nmu Auto Build
+	dpkg-buildpackage -rfakeroot -d -us -uc --host-type ${CONFIG_HOST}
 	-dpkg-sig --sign builder -k D1EB60BE ../n2n_*deb
 	@\rm -f ../n2n_*dsc ../n2n_*.gz ../n2n_*changes
 	@/bin/mv ../n2n_*deb .