I don't remember why it was set to 077 initially, but now I see it
causes problems. Exactly, py-i2phosts-builer called from master creates
hosts.txt file with 600 permissions, so file is not readable by nginx
for example. New umask fixes this problem.
Multiple split by '=' character may cause wrong hash addition because
trailing '==' were stripped from base64 hash. These trailing '==' are
used in ECDSA keys, see http://zzz.i2p/topics/1763
Many hosts are not resolved with first lookup b32->b64, but if we query
2nd time, host can be resolved. Because of this, some registered hosts
may be never seen while they actually up!
Master log file first opened as root, than daemonization with privilege
drop happens and master then unable to log to this logfile because of
insufficient permissions. So chown logfile to "runas" user to avoid this
situation.