* nginx_conf resource: Fix include paths with quotes
* Move quote removal to `NginxParser`
* Add parsers/tests for quotes in quotes
Signed-off-by: Jerry Aldrich <jerryaldrichiii@gmail.com>
An nginx config may contain configuration settings that are quoted, such
as a map entry:
"~^\/opcache-api" 1;
The `nginx_conf` resource was failing to properly parse these.
Signed-off-by: Adam Leff <adam@leff.co>