"make_sock: could not bind to address [::]:443" when restarting apache (installing trac and mod_wsgi)

You guys are going to laugh at this. I had an extra Listen 443 in ports.conf that shouldn't have been there. Removing that solved this.

Thank you for you answers, on apache 2.4.x versions if have installed ssl_module using yum command, dont want to add the port :443 in httpd.conf (main) file,

To find out the port 443 in configure files,

# grep '443' /etc/httpd/conf.d/*

/etc/httpd/conf.d/ssl.conf:Listen 443 https
/etc/httpd/conf.d/ssl.conf:<VirtualHost _default_:443>
/etc/httpd/conf.d/ssl.conf:#ServerName www.example.com:443

# grep '443' /etc/httpd/conf/httpd.conf 
Listen 443

Just remove the line or command it (Listen 443) from httpd.conf file.

I'm adding another answer to this as I had the same problem and solved it the same way: I had installed SSL on apache2 using a2enmod ssl, which seems to have added an extra configuration in /etc/apache2/ports.conf:

NameVirtualHost *:80
Listen 80

NameVirtualHost *:443
Listen 443

<IfModule mod_ssl.c>
    Listen 443
</IfModule>

<IfModule mod_gnutls.c>
    Listen 443
</IfModule>

I had to comment out the first Listen 443 after the NameVirtualHost *:443 directive:

NameVirtualHost *:443
#Listen 443

But I'm thinking I can as well let it and comment the others. Anyway, thank you for the solution :)