Spelling: weather/whether.
Grammar: slight adjustments.
New content: Changed Apache to Apache httpd (the name of their server,
differentiates from the hundreds of other projects they have),
introduced Nginx at the same time and then split the two
configurations. Added a note that other software may be able to be
used, but indicated sysadmins familiar with those packages should
configure them (they should be able to work it out from the existing
examples anyway).
* Update config variables
* add favicon
* host is nowadays known as hosts4
* add hosts6
* move keepalive above port as that is how it appears in the bot too
* specify that HTTPd might require port change, not HTTP
* HTTPd might not work if port is too low = port is under 1024
* Apache is in front of Supybot's HTTPd, not behind.
