nginx-0.1.13-RELEASE import

    *) Feature: the server_names_hash and server_names_hash_threshold
       directives.

    *) Bugfix: the *.domain.tld names in the "server_name" directive did
       not work.

    *) Bugfix: the %request_length log parameter logged the incorrect
       length.

auto/os/linux

diff --git a/auto/os/linux b/auto/os/linux
index f3c6722..8c140b3 100644
--- a/auto/os/linux
+++ b/auto/os/linux
@@ -26,6 +26,8 @@
 version=`grep "#define LINUX_VERSION_CODE" /usr/include/linux/version.h \
          | sed -e 's/^.* \(.*\)$/\1/'`
 
+version=${version:-0}
+
 
 # enable the rt signals on Linux 2.2.19 and onward