Build apache2.4

1. get apr
   wget http://ftp.mirror.tw/pub/apache/apr/apr-1.4.6.tar.gz
    
2. get berkeley db
   wget http://download.oracle.com/berkeley-db/db-5.3.21.tar.gz
   tar xzf db-5.3.21.tar.gz
   cd db-5.3.21/build_unix
   ../dist/configure --prefix=$topt --enable-cxx --enable-stl
   make && make install
   
3. get apr-util
   wget http://ftp.mirror.tw/pub/apache//apr/apr-util-1.5.1.tar.gz
   
4. build apache
   ./configure --prefix=$topt/apache2 --with-apr=$topt/bin/apr-1-config --with-apr-util=$topt/bin/apu-1-config --enable-mods-shared=all --enable-deflate --enable-proxy --enable-proxy-balancer --enable-proxy-http --enable-dav --enable-dav-fs --enable-so --with-mpm=worker --enable-mpms-shared --sysconfdir=$HOME/etc/httpd