[mod_dirlisting] read dir in pieces; less blocking
[mod_dirlisting] read dir in pieces; less blocking

read dir in pieces, allowing server to do other work between reads

(avoid potentially blocking other requests for long periods of time
while reading a large directory)

lighttpd/lighttpd1.4,lighttpd/lighttpd1.4,lighttpd/lighttpd1.4,gstrauss/lighttpd1.4,gstrauss/lighttpd1.4,gstrauss/lighttpd1.4,lighttpd/lighttpd1.4,lighttpd/lighttpd1.4,gstrauss/lighttpd1.4,gstrauss/lighttpd1.4,gstrauss/lighttpd1.4,lighttpd/lighttpd1.4