vendor: upgrade go-mysql-server

Signed-off-by: Miguel Molina <[email protected]>

Author: erizocosmico

Gopkg.toml

@@ -1,6 +1,6 @@
 [[constraint]]
   name = "gopkg.in/src-d/go-mysql-server.v0"
-  revision = "090a17d38c22a28eccf631f400c11704f65bb6ce"
+  revision = "b31a439b8976af8e2f68d0528713a43714d2bd0a"
 
 [[constraint]]
   name = "github.com/jessevdk/go-flags"

docs/using-gitbase/functions.md

@@ -17,4 +17,4 @@ To make some common tasks easier for the user, there are some functions to inter
 
 ## Standard functions
 
-You can check standard functions in [`go-mysql-server` documentation](https://github.com/src-d/go-mysql-server/tree/090a17d38c22a28eccf631f400c11704f65bb6ce#custom-functions).
+You can check standard functions in [`go-mysql-server` documentation](https://github.com/src-d/go-mysql-server/tree/be1c47e16d43092379bb5ffe9c06ec5afcd58d4e#custom-functions).

docs/using-gitbase/indexes.md

@@ -10,4 +10,4 @@ Note that you can create an index either **on one or more columns** or **on a si
 
 You can find some more examples in the [examples](./examples.md#create-an-index-for-columns-on-a-table) section.
 
-See [go-mysql-server](https://github.com/src-d/go-mysql-server/tree/090a17d38c22a28eccf631f400c11704f65bb6ce#indexes) documentation for more details
+See [go-mysql-server](https://github.com/src-d/go-mysql-server/tree/be1c47e16d43092379bb5ffe9c06ec5afcd58d4e#indexes) documentation for more details

docs/using-gitbase/supported-syntax.md

@@ -1,3 +1,3 @@
 ## Supported syntax
 
-To see the SQL subset currently supported take a look at [this list](https://github.com/src-d/go-mysql-server/blob/090a17d38c22a28eccf631f400c11704f65bb6ce/SUPPORTED.md) from [src-d/go-mysql-server](https://github.com/src-d/go-mysql-server).
+To see the SQL subset currently supported take a look at [this list](https://github.com/src-d/go-mysql-server/blob/be1c47e16d43092379bb5ffe9c06ec5afcd58d4e/SUPPORTED.md) from [src-d/go-mysql-server](https://github.com/src-d/go-mysql-server).