[urcd.pyx, urc2sd.pyx][security] randombytes upgraded to use /dev/urandom
[.gitignore, urc2sd.pyx, urcd.pyx][security] updates for randombytes, temporary workaround for nameless urc-integ http://anonet2.biz/URC#urc-integ
bugfix
bugfix
bugfix
env/LIMIT for urchubstream.c
[src/urchubstream.c] bugfix