(tinybit) get rid of endless loop due to wrong usage of pxe detect.
 show as error message when command not found
add debug_time function
speedup block_read_func
change ipxegrldr embeded script
blocklist/map尽量和0.4.5c的代码保持一致
优化blocklist_func
Merge pull request #13 from chenall/0.4.6a

0.4.6a 2014-12-30