Bump nginx version.

src/hst_autocompile.sh

@@ -6,7 +6,7 @@ INSTALL_DIR='/usr/local/hestia'
 
 # Set Version for compiling
 HESTIA_V='0.9.8-29_amd64'
-NGINX_V='1.15.10'
+NGINX_V='1.15.11'
 OPENSSL_V='1.1.1b'
 PCRE_V='8.42'
 ZLIB_V='1.2.11'