Add links to MP and resolve minor fixes

appengine/swarming/proto/config.proto

Index: appengine/swarming/proto/config.proto
diff --git a/appengine/swarming/proto/config.proto b/appengine/swarming/proto/config.proto
index d3f29faded327c43a1dc0cea104a3755eb32269c..99779869830dd620cacdca3a79f3c1e458218b91 100644
--- a/appengine/swarming/proto/config.proto
+++ b/appengine/swarming/proto/config.proto
@@ -38,6 +38,14 @@ message SettingsCfg {
 
   // A mapping "dimension" => "who can posts tasks for it".
   optional DimensionACLs dimension_acls = 10;
+
+  // A partial url which a task id will be appended. The result should be a
+  // valid link to the milo output of a task (if any).
+  optional string milo_server_prefix = 11;
+
+  // A partial url which a Skia git revision will be appended. The result

[M-A Ruel, 2016/10/11 16:26:55]

I think we need a more generic way to define this since this doesn't scale.

One thing I could propose is to parse a tag that would include the link to the
source code itself. It's cool because then one can search for tasks with this
commit hash.

[kjlubick, 2016/10/11 17:00:03]

I agree.  I'll rework this to deal with a tag instead.

[kjlubick, 2016/10/12 13:59:51]

As it turns out, there was a sk_repo tag already being used, so I reworked the
code to use that instead.

+  // should be a valid link to the source code at that revision (if any).
+  optional string sk_revision_prefix = 12;
 }