Can't access 127.0.0.1 apache 2 (MacOS X) - macos

Question

After my MacBook Pro mid2009 has been updated to MacOS X El Capitan I found that many things don't work anymore as they were before.
Built-in apache2 is not aviable on http://127.0.0.1 but aviable on http://localhost. In Yosemite both of them was working properly.
/private/etc/hosts looks like that:
##
# Host Database
#
# localhost is used to configure the loopback interface
# when the system is booting. Do not change this entry.
##
127.0.0.1 localhost
255.255.255.255 broadcasthost
::1 localhost
It's looks strange cuz 127.0.0.1 and localhost are the same thing.
Any idea what's going on?
httpd.conf
#
# Listen: Allows you to bind Apache to specific IP addresses and/or
# ports, instead of the default. See also the <VirtualHost>
# directive.
#
# Change this to Listen on specific IP addresses as shown below to
# prevent Apache from glomming onto all bound IP addresses.
#
#Listen 12.34.56.78:80
Listen 80

Answer 1

In your httpd.conf, you will have a Listen directive, this will be the ip address / port that the server will bind to.
In your conf file you have defined
Listen 80
That is stating that you should bind to all interfaces on port 80, this will include both IPv4, and IPv6;
Disabling IPv6 should would, change this line to
# allow access on all interfaces
Listen 0.0.0.0:80
# or for local access only
# Listen 127.0.0.1:80
# or more specifically
# Listen 192.168.0.0:80
# To listen on a specific subnet
To figure out why the site will not load when accessed via IPv6, would require additional error / debug logs.