Document check header and method

Author: schmichael

website/source/api/json-jobs.html.md

@@ -58,6 +58,8 @@ Below is the JSON representation of the job outputed by `$ nomad init`:
                         "Type": "tcp",
                         "Command": "",
                         "Args": null,
+                        "Header": {},
+                        "Method": "",
                         "Path": "",
                         "Protocol": "",
                         "PortLabel": "",
@@ -344,12 +346,18 @@ The `Task` object supports the following keys:
 
          - `Name`: The name of the health check.
 
+	 - `Header`: Headers for HTTP checks. Should be an object where the
+	   values are an array of values. Headers will be written once for each
+           value.
+
          - `Interval`: This indicates the frequency of the health checks that
            Consul will perform.
 
          - `Timeout`: This indicates how long Consul will wait for a health
            check query to succeed.
 
+         - `Method`: The HTTP method to use for HTTP checks. Defaults to GET.
+
          - `Path`: The path of the HTTP endpoint which Consul will query to query
            the health of a service if the type of the check is `http`. Nomad
            will add the IP of the service and the port, users are only required

website/source/docs/job-specification/service.html.md

@@ -130,6 +130,9 @@ scripts.
   that Consul will perform. This is specified using a label suffix like "30s"
   or "1h". This must be greater than or equal to "1s"
 
+- `method` `(string: "GET")` - Specifies the HTTP method to use for HTTP
+  checks.
+
 - `name` `(string: "service: <name> check")` - Specifies the name of the health
   check.
 
@@ -159,6 +162,27 @@ scripts.
 - `tls_skip_verify` `(bool: false)` - Skip verifying TLS certificates for HTTPS
   checks. Requires Consul >= 0.7.2.
 
+#### `header` Stanza
+
+HTTP checks may include a `header` stanza to set HTTP headers. The `header`
+stanza parameters have lists of strings as values. Multiple values will cause
+the header to be set multiple times, once for each value.
+
+```hcl
+service {
+  check {
+    type     = "http"
+    port     = "lb"
+    path     = "/_healthz"
+    interval = "5s"
+    timeout  = "2s"
+    header {
+      Authorization = ["Basic ZWxhc3RpYzpjaGFuZ2VtZQ=="]
+    }
+  }
+}
+```
+
 
 ## `service` Examples
 
@@ -232,8 +256,8 @@ argument provided as a value to the `args` array.
 
 This example shows a service with an HTTP health check. This will query the
 service on the IP and port registered with Nomad at `/_healthz` every 5 seconds,
-giving the service a maximum of 2 seconds to return a response. Any non-2xx code
-is considered a failure.
+giving the service a maximum of 2 seconds to return a response, and include an
+Authorization header. Any non-2xx code is considered a failure.
 
 ```hcl
 service {
@@ -243,6 +267,9 @@ service {
     path     = "/_healthz"
     interval = "5s"
     timeout  = "2s"
+    header {
+      Authorization = ["Basic ZWxhc3RpYzpjaGFuZ2VtZQ=="]
+    }
   }
 }
 ```
@@ -269,6 +296,7 @@ service {
     path     = "/_healthz"
     interval = "5s"
     timeout  = "2s"
+    method   = "POST"
   }
 
   check {