allow using the mainline repo on redhat

defaults/main.yml

@@ -4,6 +4,7 @@ nginx_default_release: ""
 
 # Used only for Redhat installation, enables source Nginx repo.
 nginx_yum_repo_enabled: true
+nginx_yum_repo_mainline: false
 
 # Use the official Nginx PPA for Ubuntu, and the version to use if so.
 nginx_ppa_use: false

templates/nginx.repo.j2

@@ -1,5 +1,5 @@
 [nginx]
 name=nginx repo
-baseurl=http://nginx.org/packages/centos/{{ ansible_distribution_major_version }}/$basearch/
+baseurl=http://nginx.org/packages{{ '/mainline' if nginx_yum_repo_mainline }}/centos/{{ ansible_distribution_major_version }}/$basearch/
 gpgcheck=0
 enabled=1