Note contactinfo and myfamily as required in more places

Includes a sentence from cypherpunks; for ticket 24526.

changes/bug24526

@@ -0,0 +1,4 @@
+  o Documentation:
+    - Document that operators who run more than one relay or bridge are
+      expected to set MyFamily and ContactInfo correctly. Closes ticket
+      24526.

doc/tor.1.txt

@@ -1703,7 +1703,12 @@ is non-zero):
     descriptors containing these lines and that Google indexes them, so
     spammers might also collect them. You may want to obscure the fact
     that it's an email address and/or generate a new address for this
-    purpose.
+    purpose. +
+ +
+    ContactInfo **must** be set to a working address if you run more than one
+    relay or bridge.  (Really, everybody running a relay or bridge should set
+    it.)
+
 
 [[ExitRelay]] **ExitRelay** **0**|**1**|**auto**::
     Tells Tor whether to run as an exit relay.  If Tor is running as a
@@ -1831,7 +1836,11 @@ is non-zero):
     compromise its concealment. +
  +
     When listing a node, it's better to list it by fingerprint than by
-    nickname: fingerprints are more reliable.
+    nickname: fingerprints are more reliable. +
+ +
+    MyFamily **must** be set correctly if you run more than one relay or
+    bridge. (That is, every relay should list all the others as described
+    above.)
 
 [[Nickname]] **Nickname** __name__::
     Set the server's nickname to \'name'. Nicknames must be between 1 and 19

src/config/torrc.minimal.in-staging

@@ -132,6 +132,9 @@
 ## spammers might also collect them. You may want to obscure the fact that
 ## it's an email address and/or generate a new address for this purpose.
 ## Notice that "<" and ">" are recommended.
+##
+## If you are running multiple relays, you MUST set this option.
+##
 #ContactInfo Random Person <nobody AT example dot com>
 ## You might also include your PGP or GPG fingerprint if you have one.
 ## Use the full fingerprint, not just a (short) KeyID: KeyIDs are easy
@@ -161,6 +164,9 @@
 ## See https://www.torproject.org/docs/faq#MultipleRelays
 ## However, you should never include a bridge's fingerprint here, as it would
 ## break its concealability and potentially reveal its IP/TCP address.
+##
+## If you are running multiple relays, you MUST set this option.
+##
 #MyFamily $keyid,$keyid,...
 
 ## Uncomment this if you want your relay to allow IPv6 exit traffic.

src/config/torrc.sample.in

@@ -136,6 +136,9 @@
 ## descriptors containing these lines and that Google indexes them, so
 ## spammers might also collect them. You may want to obscure the fact that
 ## it's an email address and/or generate a new address for this purpose.
+##
+## If you are running multiple relays, you MUST set this option.
+##
 #ContactInfo Random Person <nobody AT example dot com>
 ## You might also include your PGP or GPG fingerprint if you have one:
 #ContactInfo 0xFFFFFFFF Random Person <nobody AT example dot com>
@@ -162,6 +165,9 @@
 ## https://www.torproject.org/docs/faq#MultipleRelays
 ## However, you should never include a bridge's fingerprint here, as it would
 ## break its concealability and potentially reveal its IP/TCP address.
+##
+## If you are running multiple relays, you MUST set this option.
+##
 #MyFamily $keyid,$keyid,...
 
 ## Uncomment this if you do *not* want your relay to allow any exit traffic.