unzip was not building with bzip2 support

This appears to have begun at the point that we stopped
shipping the static libbz2.a.

Fixes: #3448

build/unzip/build.sh

@@ -31,8 +31,13 @@ HARDLINK_TARGETS="
 "
 SKIP_LICENCES="*"
 
-# Copied from upstream's pkg makefile
-export LOCAL_UNZIP="-DUNICODE_SUPPORT -DNO_WORKING_ISPRINT -DUNICODE_WCHAR"
+CONFIGURE_OPTS="
+    -DNO_LCHMOD
+    -DUNICODE_SUPPORT
+    -DUNICODE_WCHAR
+    -DWILD_STOP_AT_DIR
+"
+export LOCAL_UNZIP="${CONFIGURE_OPTS[0]//$'\n'/}"
 
 configure_amd64() {
     export i386
@@ -48,6 +53,7 @@ configure_aarch64() {
 }
 
 pre_install() {
+    ldd $PROG | $EGREP -s libbz2 || logerr "unzip was built without bzip2"
     save_variable MAKE_INSTALL_ARGS
     MAKE_INSTALL_ARGS+=" prefix=$DESTDIR$PREFIX"
 }
@@ -58,7 +64,7 @@ post_install() {
 
 
 BASE_MAKE_ARGS="-f unix/Makefile"
-MAKE_ARGS="$BASE_MAKE_ARGS generic IZ_BZIP2=bzip2"
+MAKE_ARGS="$BASE_MAKE_ARGS generic"
 MAKE_INSTALL_ARGS="$BASE_MAKE_ARGS install"
 
 init

build/unzip/patches/configure.patch

@@ -0,0 +1,14 @@
+--- a/unix/configure~	2024-01-23 18:53:07.146124861 +0000
++++ a/unix/configure	2024-01-23 18:53:51.665682899 +0000
+@@ -588,9 +588,9 @@
+ # bzip2
+
+ echo "Check bzip2 support"
+-D_USE_BZ2=""
++D_USE_BZ2="-DUSE_BZIP2"
+ LIBBZ2=""
+-L_BZ2=""
++L_BZ2="-lbz2"
+ CC_BZ="${CC}"
+
+ if test -n "${IZ_BZIP2}" -a "${IZ_BZIP2}" != "bzip2" ; then