Skip test that hangs due to differences in nc(1) behavior between OpenBSD
and Linux.
Index: Makefile.in
--- Makefile.in.orig
+++ Makefile.in
@@ -932,7 +932,7 @@ TESTS = tests/addid1.sh tests/addid1.sh tests/ascxml.s
 	tests/cite4.sh\
 	tests/clean1.sh tests/copy1.sh tests/copy2.sh tests/copy3.sh\
 	tests/copy4.sh tests/copy5.sh tests/copy6.sh\
-	tests/copy7.sh tests/copy8.sh tests/extract1.sh\
+	tests/copy7.sh tests/copy8.sh\
 	tests/hxnsxml1.sh tests/hxnsxml2.sh tests/hxnsxml3.sh\
 	tests/hxnsxml4.sh tests/incl1.sh tests/incl10.sh\
 	tests/incl11.sh tests/incl2.sh tests/incl3.sh tests/incl4.sh\