move files with .shtml prefix to .html

The days when server side includes were in use are over.

Signed-off-by: Sami Kerola <kerolasa@iki.fi>
remove server side includes

Signed-off-by: Sami Kerola <kerolasa@iki.fi>
remove few links

Signed-off-by: Sami Kerola <kerolasa@iki.fi>
add link to logger(1) page

A bit of text about syslog RFC5424 format, systemd integration, etc.

Signed-off-by: Sami Kerola <kerolasa@iki.fi>
remove files no longer in use

Signed-off-by: Sami Kerola <kerolasa@iki.fi>