Update README to add appName (#32)

* docs: elaborate on what appName does

* readme: add appName to changes

Author: domodwyer

README.md

@@ -19,9 +19,10 @@ Further PR's (with tests) are welcome, but please maintain backwards compatibili
 * Fixes timezone handling ([details](https://github.com/go-mgo/mgo/pull/464)) 
 * Integration tests run against newest MongoDB 3.2 releases ([details](https://github.com/globalsign/mgo/pull/4), [more](https://github.com/globalsign/mgo/pull/24))
 * Improved multi-document transaction performance ([details](https://github.com/globalsign/mgo/pull/10), [more](https://github.com/globalsign/mgo/pull/11), [more](https://github.com/globalsign/mgo/pull/16))
-* Fixes cursor timeouts ([detials](https://jira.mongodb.org/browse/SERVER-24899))
+* Fixes cursor timeouts ([details](https://jira.mongodb.org/browse/SERVER-24899))
 * Support index hints and timeouts for count queries ([details](https://github.com/globalsign/mgo/pull/17))
 * Allow dropping all indexes on a collection ([details](https://github.com/globalsign/mgo/pull/25))
+* Annotates log entries/profiler output with optional appName on 3.4+ ([details](https://github.com/globalsign/mgo/pull/28))
 
 ---
 

session.go

@@ -157,9 +157,9 @@ const (
 // topology.
 //
 // Dial will timeout after 10 seconds if a server isn't reached. The returned
-// session will timeout operations after one minute by default if servers
-// aren't available. To customize the timeout, see DialWithTimeout,
-// SetSyncTimeout, and SetSocketTimeout.
+// session will timeout operations after one minute by default if servers aren't
+// available. To customize the timeout, see DialWithTimeout, SetSyncTimeout, and
+// SetSocketTimeout.
 //
 // This method is generally called just once for a given cluster.  Further
 // sessions to the same cluster are then established using the New or Copy
@@ -184,8 +184,8 @@ const (
 // If the port number is not provided for a server, it defaults to 27017.
 //
 // The username and password provided in the URL will be used to authenticate
-// into the database named after the slash at the end of the host names, or
-// into the "admin" database if none is provided.  The authentication information
+// into the database named after the slash at the end of the host names, or into
+// the "admin" database if none is provided.  The authentication information
 // will persist in sessions obtained through the New method as well.
 //
 // The following connection options are supported after the question mark:
@@ -237,8 +237,8 @@ const (
 //
 //     appName=<appName>
 //
-//        The identifier of the client application which ran the operation. This
-//        param can't exceed 128 bytes
+//        The identifier of this client application. This parameter is used to
+//        annotate logs / profiler output and cannot exceed 128 bytes.
 //
 // Relevant documentation:
 //