Contact: Add 'Community channels' section to Abuse (#685)

- Mention where reports should be made.
- Mention expectations regarding propagation of bans and provide context.
- Provide additional means of recourse in cases of interpersonal conflicts
  between a participant and a moderator.
- Explain that moderation standards can be stricter (and not ToU-only)
  at the behest of a moderator.

Reviewed-on: https://codeberg.org/Codeberg/Documentation/pulls/685
Reviewed-by: Gusted <gusted@noreply.codeberg.org>
Co-authored-by: Panagiotis "Ivory" Vasilopoulos <git@n0toose.net>
Co-committed-by: Panagiotis "Ivory" Vasilopoulos <git@n0toose.net>

.cspell.json

@@ -116,7 +116,8 @@
     "letsencrypt.org",
     "accounturi",
     "Ente",
-    "getent"
+    "getent",
+    "sealioning"
   ],
   "ignorePaths": [
     "**/node_modules/**/*",

content/contact.md

@@ -80,11 +80,34 @@ Please keep in mind that we are only responsible for content hosted under the fo
 In general, we avoid acting on reports involving _exclusively_ off-site behavior or rumors.
 Reasons for that include limited time constraints, feasibility or to protect ourselves from
 manipulation and accusations of libel. The reasons are practical and not a claim to neutrality.
+
 However, such reports may also be taken into account when we receive actionable reports concerning
 the same people. At our own discretion, we may apply some exceptions: We may take action e.g.
 when an individual encourages harassment on-site, even if said encouragement is taking place
 off-site.
 
+#### Community channels
+
+Our real-time discussion channels (e.g. Matrix rooms) are where Codeberg's community meets.
+If you witness abusive behavior in our channels, please report it to its active moderators
+directly (and, if appropriate, privately).
+
+If you wish to complain about the moderation of our channels, please [contact the e. V.](#email)
+
+The Codeberg community (or a subset of it) meets in our real-time discussion channels;
+this is unlike [Codeberg.org], where people and communities can work on their repositories
+in isolation from each other.
+To ensure the community's health and foster a friendly and welcoming climate, a channel's
+moderators can apply stricter moderation standards as they deem fit.
+For instance, they can warn or exclude (i.e. mute, kick, ban) individuals over disruptive behavior
+(e.g. trolling, [sealioning]) temporarily or permanently, proactively or reactively.
+We do not always request that people move their repositories away from [Codeberg.org] as a result
+of disputes that arose in our community spaces, but reserve the right to do so in cases
+that we deem as gravely serious.
+
+[Codeberg.org]: https://codeberg.org
+[sealioning]: https://en.wikipedia.org/wiki/Sealioning
+
 ### Legal inquiries
 
 For legal inquiries, please refer to the [Imprint](https://codeberg.org/codeberg/org/src/Imprint.md).