Drop PHP version support (useless) + fix some bugs

doc/php.md

@@ -2,8 +2,7 @@ PHP
 ===
 
 `nginx_php`:
-  - `version`: (M) PHP version
-  - `upstream_name` (O)
+  - `upstream_name` (M)
   - `sockets`: (O) socket list
 
 If `sockets` is not provided, if uses local unix socket (based on PHP version).
@@ -16,8 +15,8 @@ Each socket have:
 
 XOR
 
-- `host`
-- `port`
-- `weight`
-- `max_fails`
-- `fail_timeout`
+- `host` (M)
+- `port` (M)
+- `weight` (O)
+- `max_fails` (O)
+- `fail_timeout` (O)

doc/site.md

@@ -29,7 +29,6 @@ Common
 - `proto`: (O) list of protocol used. Default is a list with "http". If you need http and https, you must set a list with "http" and "https". You can only set "https" without http support.
 - `ssl_name`: (D) name of the key used when using TLS/SSL. Optional when `proto` contains "https". If you don't set this value, it will search by `name`.
 - `ssl_template` (O) "strong" (default) or "legacy". You can disable SSL helpers and add your own directives by setting "false".
-- `php_version` (O) Sepecify PHP version (5 or 7)
 - `http_proxy_protocol_port` (O) Enable proxy protocol on http port.
 - `https_proxy_protocol_port` (O) Enable proxy protocol on https port.