HGKeeper

Fix `make install` on cygwin64
draft
2018-03-08, Eion Robb

f3ad124b413d

Fix `make install` on cygwin64

// proto2 is required because we need to be able to serialize default values:

syntax = "proto2";

message GmailNotification {

optional string thread_id = 3;

//optional string previous_id = 4;

optional string id = 5;

repeated string labels = 6;

optional string subject = 7;

optional string snippet = 8;

optional string sender_name = 9;

optional string sender_email = 10;

//repeated unknown = 11;

}