Updated documentation.

doc/snac.5

@@ -91,8 +91,8 @@ has the user id as name and contains the following subdirectories and files:
 User configuration file.
 .It Pa user_o.json
 User configuration override file. This file is intended for administrators to
-override some user preferences (e.g. for setting shorter purge days that what
-the user may have defined).
+override some user preferences. For current version, the fields that can be
+overridden are 'purge_days' and 'email'.
 .It Pa key.json
 Secret/public key PEM data.
 .It Pa followers.idx

doc/snac.8

@@ -174,6 +174,8 @@ this option if something is very broken.
 By setting this value, you can specify the exact number of threads
 .Nm
 will use when processing connections. Values lesser than 4 will be ignored.
+.It Ic disable_email_notifications
+By setting this to true, no email notification will be sent for any user.
 .El
 .Pp
 You must restart the server to make effective these changes.