replace www/apache22 with www/apache24
change www/boa's description
add www/cherokee and www/lighttpd web servers to the list
Nginx -> nginx (as used by the project)
minor fixes

PR: 227714
Submitted by: Vinicius Zavam <egypcio AT googlemail DOT com>
Approved by: wosch
Differential Revision: https://reviews.freebsd.org/D15167