Adding default_server to default ipv4 server block.
Adding default_server to default ipv4 server block.

allprogrammic/deb-nginx,ser/dotdeb-nginx,ser/dotdeb-nginx,allprogrammic/deb-nginx,ser/dotdeb-nginx,ser/dotdeb-nginx,allprogrammic/deb-nginx,allprogrammic/deb-nginx