Add explicit disabled and enabled values to all cvars on the config file

[evandrocoan]

Add explicit disabled and enabled values to all cvars on the config file

For example, this bellow:

// Indicates whether there should be a vote near the end 
// of the map to decide what the next map will be.
gal_endofmapvote 1

Should be like this:

// Indicates whether there should be a vote near the end 
// of the map to decide what the next map will be. (Default 1)
//
// 0 - do not to perform a automatic end map voting.
// 1 - to perform a automatic end map voting.
gal_endofmapvote 1