webserver: add missing default for config variable

webserver/defaults/main.yml

@@ -4,6 +4,7 @@ cipher_strength: modern
 nginx_pam_groups: []
 webserver_enable_acme_default: true
 webserver_enable_ipv6: true
+webserver_enable_reuseport: false
 webserver_resolver: "{{ nameservers }}"
 disallow_apache2: true
 webservers: []
@@ -14,6 +15,7 @@ webservers: []
 # The following settings may be used to tweak performance.
 # Take with a grain of salt. Measure actual performance.
 webserver_workers: 4  # may also be auto
+# webserver_enable_reuseport: true
 # webserver_worker_rlimit_nofile: 100000
 # webserver_worker_connections: 2048
 # webserver_worker_aio_requests: 128