add survey to service matrix

service.md

@@ -34,6 +34,7 @@ Those are services managed by TPA directly.
 | [submission][]       | email submission                  | N/A                                  | anarcat              | 100%       | LDAP                                                                |
 | [static-shim][]      | static site / GitLab shim         | N/A                                  | TPA                  |            | no                                                                  |
 | [status][]           | status dashboard                  | N/A                                  | anarcat              |            |                                                                     |
+| [survey][]           | limesurvey instance               | N/A                                  | TPA, lavamind        | 50%        | yes                                                                   |
 | [tls][]              | X509 certificate management       | N/A                                  | TPA                  | 50%        | no                                                                  |
 | [wkd][]              | OpenPGP certificates distribution | N/A                                  | TPA                  | 10%        | yes                                                                 |
 
@@ -64,6 +65,7 @@ complete. This does not include undocumented services, below.
 [puppet]: howto/puppet
 [static-component]: howto/static-component
 [static-shim]: service/static-shim
+[survey]: service/survey
 [tls]: howto/tls
 [wkd]: howto/Web-Key-Directory-[wkd]---How-keys-are-managed-in-Tor