Connect apache tcp socket

This shows how to connect your application listening on TCP port <port number> (started with "-p" option in mgrg) to Apache web server.

- Step 1:
To setup Apache as a reverse proxy and connect your application to it, you need to enable FastCGI proxy support, which generally means "proxy" and "proxy_fcgi" modules - this is done only once:

For Debian (like Ubuntu) and OpenSUSE systems you need to enable proxy and proxy_fcgi modules:
```
sudo a2enmod proxy
sudo a2enmod proxy_fcgi
```
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For Fedora systems (or others like Archlinux) enable proxy and proxy_fcgi modules by adding (or uncommenting) LoadModule directives in the Apache configuration file - the default location of this file on Linux depends on the distribution. For Fedora (such as RedHat), Archlinux:
```
sudo vi /etc/httpd/conf/httpd.conf
```
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For OpenSUSE:
```
sudo vi /etc/apache2/httpd.conf
```
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Add this to the end of the file:
```
LoadModule proxy_module modules/mod_proxy.so
LoadModule proxy_fcgi_module modules/mod_proxy_fcgi.so
```
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- Step 2:
Edit the Apache configuration file:

For Debian (such as Ubuntu):
```
sudo vi /etc/apache2/apache2.conf
```
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for Fedora (such as RedHat), Archlinux:
```
sudo vi /etc/httpd/conf/httpd.conf
```
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and for OpenSUSE:
```
sudo vi /etc/apache2/httpd.conf
```
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Add this to the end of file ("/<app path>" is the application path, see request):

ProxyPass "/<app path>/" fcgi://127.0.0.1:<port number>/

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- Step 3:
Finally, restart Apache. On Debian systems (like Ubuntu) or OpenSUSE:

sudo systemctl restart apache2

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On Fedora systems (like RedHat) and Arch Linux:

sudo systemctl restart httpd

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Note: you must not have any other URL resource that starts with "/<app path>/" (such as for example "/<app path>/something") as the web server will attempt to pass them as a reverse proxy request, and they will likely not work. If you need to, you can change the application path to be different from "/<app path>", see request.