Updating server dependancies. Also adding github.com/jaytaylor/html2text and gopkg.in/gomail.v2 (#5748)

vendor/github.com/lib/pq/ssl_windows.go

@@ -2,8 +2,8 @@
 
 package pq
 
-import "os"
-
-// sslCertificatePermissions checks the permissions on user-supplied certificate
-// files. In libpq, this is a no-op on Windows.
-func sslCertificatePermissions(cert, key os.FileInfo) {}
+// sslKeyPermissions checks the permissions on user-supplied ssl key files.
+// The key file should have very little access.
+//
+// libpq does not check key file permissions on Windows.
+func sslKeyPermissions(string) error { return nil }