Appease make check-spaces
Add changes file for bug #11235
Work on the changelog for 0.2.5.3-alpha some more
copy-edit the 0.2.5.3-alpha changelog even more
fix a few grammar things, and deprecate 'servers' and 'nodes'

also clarify a few explanations. so far so good!
use the formatting from 0.2.4.21 for the 0.2.4.21 changelog stanza
missing colon
sort stanzas by interest, and sort by version within stanzas

(users want to know about client fixes before they want to know about
unit test fixes.)
extract some changelog principles into doc/HACKING
Merge remaining changes/* items into ChangeLog

(Not taking bug11235 since it's a whitespace fix)