note to self:

to set up a virtual host named viho for local web development testing on OSX El Capitan (and probably earlier):

1. define an alias name in /etc/hosts:

   127.0.0.1       localhost viho
   ::1             localhost viho
   

2. setup the virtual host configuration file /etc/apache2/other/viho.conf:

   <VirtualHost *:80>
     DocumentRoot "/path/to/where/the/files/are"
     ServerName viho
   </VirtualHost>

browse to http://viho/ and enjoy.