config: add proxy version to bootstrap (#8386)

Signed-off-by: Rama Chavali <rama.rao@salesforce.com>

Mirrored from https://github.com/envoyproxy/envoy @ 8387d60a8bc6b030f43a1a7de60588a27b052998

envoy/config/bootstrap/v2/bootstrap.proto

@@ -18,6 +18,7 @@ import "envoy/config/trace/v2/trace.proto";
 
 import "google/protobuf/duration.proto";
 import "google/protobuf/struct.proto";
+import "google/protobuf/wrappers.proto";
 
 import "validate/validate.proto";
 
@@ -148,6 +149,11 @@ message Bootstrap {
   // changes to this string, especially in multi-layer Envoy deployments or deployments using
   // extensions which are not upstream.
   string header_prefix = 18;
+
+  // Optional proxy version which will be used to set the value of :ref:`server.version statistic
+  // <server_statistics>` if specified. Envoy will not process this value, it will be sent as is to
+  // :ref:<stats sinks <envoy_api_msg_config.metrics.v2.StatsSink>.
+  google.protobuf.UInt64Value stats_server_version_override = 19;
 }
 
 // Administration interface :ref:`operations documentation

envoy/config/bootstrap/v3alpha/bootstrap.proto

@@ -18,6 +18,7 @@ import "envoy/config/trace/v3alpha/trace.proto";
 
 import "google/protobuf/duration.proto";
 import "google/protobuf/struct.proto";
+import "google/protobuf/wrappers.proto";
 
 import "validate/validate.proto";
 
@@ -144,6 +145,11 @@ message Bootstrap {
   // changes to this string, especially in multi-layer Envoy deployments or deployments using
   // extensions which are not upstream.
   string header_prefix = 18;
+
+  // Optional proxy version which will be used to set the value of :ref:`server.version statistic
+  // <server_statistics>` if specified. Envoy will not process this value, it will be sent as is to
+  // :ref:<stats sinks <envoy_api_msg_config.metrics.v3alpha.StatsSink>.
+  google.protobuf.UInt64Value stats_server_version_override = 19;
 }
 
 // Administration interface :ref:`operations documentation