index: add sadly still necessary post from 2015

IIRC I was writing it in hope/fear of someone I know offline reading this
and that it might save me from pain such discussions tend to bring.

Then on 7ce2f89c5f I judged it as paranoia
and removed it (I think the blog has disclaimer about my opinions
possibly not being so static and that I may be a different person from
what I was at time of some typings).

Today then one channel at IRC / group at Telegram has been discussing
about me or my transness for hours thanks to this line not being common
sense, so I guess it's best to restore the message and maybe link people
to this commit message in the future if they are bothered by it.

index.html

@@ -9,8 +9,5 @@ excerpt: "Rainbowy (trans/ace) aspie, feminist & Linux user since 2008"
 <p id=bio>Rainbowy (trans/ace) aspie, feminist & Linux user since 2008</p>
 
 <ul class="centered">
-    <li><a href="/about">About me; Trans, Aspie, Ace, Feminist, Linux user & life</a></li>
-    <li><a href="{% post_url 2015-09-09-act-around-trans %}">How I wish you react to minorities that I am</a></li>
-    <li><em>Ask me before sharing either of my phone numbers! (Exception: receiver is from PPFI and can access <a href="https://piraatit.slack.com/">piraatit.slack.com</a> to read it by themself.)</em></li>
-<li><em>Kysy lupaani ennen kummankaan puhelinnumeroni jakamista! (Poikkeus: kohde on piraatti ja omaa pääsyn <a href="https://piraatit.slack.com/">piraatit.slack.com</a> ja voi lukea sen itse.)</em></li>
+    <li><a href="{% post_url 2015-09-09-act-around-trans %}">README before disclosing my trans/LGBT*/any status!</a></li>
 </ul>