Clarify privacy/data policies
<h2>Blërg Doesn't Want Much Data</h2>
<p>Blërg collects only the data necessary to create an account (username
-and password), and any data submitted via posting. HTTP logs which
-contain your IP address, browser agent stringand any URLs visited as a
-consequence of using Blërg are kept for seven days then deleted.
+and password), any data submitted via posting, and associations between
+accounts for the purpose of "subscribing" to another account. HTTP logs
+which contain your IP address, browser agent string, and any URLs
+visited as a consequence of using Blërg are kept for seven days then
+deleted.
<h2>Blërg Doesn't Want To Use Your Data</h2>
<p>Currently, all data transmitted to Blërg, including your username and
password, are transmitted over unencrypted HTTP. It is entirely
-possible for someone to view your credentials in transit. We recommend
-that you don't use the same password on Blërg as you use elsewhere (but
-that's just good password policy).
+possible for someone to view data you submit while it is in transit. We
+recommend that you don't use the same password on Blërg as you use
+elsewhere (but that's just good password policy).
<p>Passwords are hashed server-side with <a
href="https://www.tarsnap.com/scrypt.html">scrypt</a> with