Update configuration options in README.md (#243)

README.adoc

@@ -42,8 +42,23 @@ include:
 
 |`bind_address`
 |`"127.0.0.1:12220"`
-|Yes
-|Specifies that the server should bind to the given IP address and TCP port.  In general, servers can bind to more than one IP address and port, but this is not (yet?) supported.
+|No
+|Specifies that the server should bind to the given IP address and TCP port.  In general, servers can bind to more than one IP address and port, but this is not (yet?) supported. Defaults to "127.0.0.1:0".
+
+|`request_body_max_bytes`
+|`4096`
+|No
+|Specifies the maximum number of bytes allowed in a request body. Larger requests will receive a 400 error. Defaults to 1024.
+
+|`tls.cert_file`
+|`"/path/to/cert.pem"`
+|Only if `tls.key_file` is set
+|Specifies the path to a PEM file containing a certificate chain for the server to identify itself with. The first certificate is the end-entity certificate, and the remaining are intermediate certificates on the way to a trusted CA. If specified, the server will only listen for TLS connections.
+
+|`tls.key_file`
+|`"/path/to/key.pem"`
+|Only if `tls.cert_file` is set
+|Specifies the path to a PEM-encoded PKCS #8 file containing the private key the server will use. If specified, the server will only listen for TLS connections.
 
 |===