Add mmap (memory map) support

Packages describing “mmap” as local USE flag

Package “mmap” Flag Description
media-libs/xine-lib Use mmap() function while reading file from local disks. Using mmap() will use more virtual memory space, but leaves to the Kernel the task of caching the file's data. mmap() access should be faster, but might misbehave if the device where the file resides in is removed during playback.
www-servers/lighttpd Use mmap when sendfile is not available

All packages providing a “mmap” USE flag (4)