nginx 1.4 -> 1.6 アップグレードログ
# cd /usr/local/src
# curl -O http://nginx.org/download/nginx-1.6.0.tar.gz
# cd nginx-1.6.0
# ./configure --prefix=/opt/nginx
# make && make install
# cd /usr/local/src
# curl -O http://nginx.org/download/nginx-1.6.0.tar.gz
# cd nginx-1.6.0
# ./configure --prefix=/opt/nginx
# make && make install