is Apache is a modular server. This implies that only the most basic functionality is included in the core server. is it so? is 
Extended features are available through modules which can be loaded into Apache. By default, a base set of modules is included in the server at compile-time. If the 

server is compiled to use dynamically loaded modules, then modules can be 
compiled separately and added at any time using the LoadModule directive. 
Otherwise, Apache must be recompiled to add or remove modules.
Configuration directives may be included conditional on a presence of a particular module by enclosing them in an <IfModule> block.
##</code><code>##

open(file, "apache.txt") ;
@modify = <file> ;

print @modify ;

##</code><code>##

open(file, "apache.txt") ;
@modify = <file> ;

print @modify."\n" ;