[libmicrohttpd] decreasing XBUF_SIZE value, postprocessor.c

[Martin Velek]

Hello,

is it possible to decrease the XBUF_SIZE (line #34, postprocessor.c)
from 1024 to e.g. 512? Even if this could bring some performance
issues. On embedded system with RTOS the stack size is a limiting
factor and with the default value, the post_process_urlencoded
function takes 1120 of stack (generated by gcc -fstack-usage).

Regards
Martin Velek