configure: simplify OpenBSD handling

Treat all OpenBSD versions in the same way. No more -fgnu89-inline.

configure.ac

@@ -184,20 +184,8 @@
             LDFLAGS="${LDFLAGS} -L/usr/local/lib -L/usr/local/lib/libnet11"
             e_magic_file="/usr/share/misc/magic"
             ;;
-        *-*-openbsd5.1)
-            CFLAGS="${CFLAGS} -D__OpenBSD__ -fgnu89-inline"
-            CPPFLAGS="${CPPFLAGS} -I/usr/local/include -I/usr/local/include/libnet-1.1"
-            LDFLAGS="${LDFLAGS} -L/usr/local/lib -I/usr/local/lib/libnet-1.1"
-            e_magic_file="/usr/local/share/misc/magic.mgc"
-            ;;
-        *-*-openbsd5.2)
-            CFLAGS="${CFLAGS} -D__OpenBSD__"
-            CPPFLAGS="${CPPFLAGS} -I/usr/local/include -I/usr/local/include/libnet-1.1"
-            LDFLAGS="${LDFLAGS} -L/usr/local/lib -I/usr/local/lib/libnet-1.1"
-            e_magic_file="/usr/local/share/misc/magic.mgc"
-            ;;
         *-*-openbsd*)
-            CFLAGS="${CFLAGS} -D__OpenBSD__ -fgnu89-inline"
+            CFLAGS="${CFLAGS} -D__OpenBSD__"
             CPPFLAGS="${CPPFLAGS} -I/usr/local/include -I/usr/local/include/libnet-1.1"
             LDFLAGS="${LDFLAGS} -L/usr/local/lib -I/usr/local/lib/libnet-1.1"
             e_magic_file="/usr/local/share/file/magic.mgc"