Remove some existing nginx options #69

src/freedombone-app-fedwiki

         function_check nginx_ssl
         nginx_ssl $FEDWIKI_DOMAIN_NAME mobile
 
+        sed -i '/Content-Security-Policy/d' $fedwiki_nginx_file
+        sed -i '/X-XSS-Protection/d' $fedwiki_nginx_file
+        sed -i '/X-Robots-Tag/d' $fedwiki_nginx_file
+        sed -i '/X-Download-Options/d' $fedwiki_nginx_file
+        sed -i '/X-Permitted-Cross-Domain-Policies/d' $fedwiki_nginx_file
+
         echo '  add_header X-Robots-Tag none;' >> $fedwiki_nginx_file
         echo '  add_header X-Download-Options noopen;' >> $fedwiki_nginx_file
         echo '  add_header X-Frame-Options DENY;' >> $fedwiki_nginx_file