Use wget or curl to download ruleset.

Makefile.am

@@ -27,7 +27,15 @@ install-conf:
 
 install-rules:
 	install -d "$(e_sysconfrulesdir)"
-	wget -qO - http://rules.emergingthreats.net/open/suricata/emerging.rules.tar.gz | tar -x -z -C "$(e_sysconfdir)" -f -
+if HAVE_FETCH_COMMAND
+if HAVE_WGET_COMMAND
+	$(HAVE_WGET) -qO - http://rules.emergingthreats.net/open/suricata/emerging.rules.tar.gz | tar -x -z -C "$(e_sysconfdir)" -f -
+else
+	$(HAVE_CURL) -s http://rules.emergingthreats.net/open/suricata/emerging.rules.tar.gz | tar -x -z -C "$(e_sysconfdir)" -f -
+endif
+else
+	@echo "UNABLE to load ruleset wget or curl are not installed on system."
+endif
 	@test -e "$(e_sysconfrulesdir)decoder-events.rules" || install -m 600 "$(top_srcdir)/rules/decoder-events.rules" "$(e_sysconfrulesdir)"
 	@test -e "$(e_sysconfrulesdir)stream-events.rules" || install -m 600 "$(top_srcdir)/rules/stream-events.rules" "$(e_sysconfrulesdir)"
 	@test -e "$(e_sysconfrulesdir)smtp-events.rules" || install -m 600 "$(top_srcdir)/rules/smtp-events.rules" "$(e_sysconfrulesdir)"

configure.ac

@@ -114,7 +114,17 @@
     fi
     AM_CONDITIONAL([HAVE_PYTHON], [test "$HAVE_PYTHON_CONFIG" != "no"])
 
-
+    AC_PATH_PROG(HAVE_WGET, wget, "no")
+    if test "$HAVE_WGET" = "no"; then
+        AC_PATH_PROG(HAVE_CURL, curl, "no")
+        if test "$HAVE_CURL" = "no"; then
+            echo
+            echo "   Warning curl or wget not found, you won't be able to"
+            echo "   download latest ruleset with 'make install-rules'"
+        fi
+    fi
+    AM_CONDITIONAL([HAVE_FETCH_COMMAND], [test "x$HAVE_WGET" != "xno" || test "x$HAVE_CURL" != "xno"])
+    AM_CONDITIONAL([HAVE_WGET_COMMAND], [test "x$HAVE_WGET" != "xno"])
 
     # Checks for libraries.