Ubuntu's Apache2 default configuration is different from the upstream default configuration, and split into several files optimized for interaction with Ubuntu tools. The configuration system is fully documented in /usr/share/doc/apache2/ . Refer to this for the full documentation. Documentation for the web server itself can be found by accessing the manual if the apache2-doc package was installed on this server.
Compression shirts on the other hand, work immediately to reduce the appearance of your man boobs! The good news is there are specially designed man boob shirts out there that can make your chest look normal just by wearing them. Some manufacturers of compression wear even make undergarments for man boobs, so they reduce the signs of male breasts but still keep the rest of your body looking great. Even run of the mill compression shirts that athletes wear for sports, like the ones made by UnderArmour work, just not as well as the best man boob shirts for gynecomastia, and typically the UnderArmour brand shirts are way more expensive.