updating: do not use cache timestamp if it is unusable for current feed;
sort chronologically instead of random
fix updating for pgsql
increase default batch size
remove random check between feedbrowser or update task executing
daemon: use define_default
daemon: remove feed limit (unused)
increase MAX_CHILD_RUNTIME
Merge branch 'master' of github.com:gothfox/Tiny-Tiny-RSS
increase updstart locking interval to prevent concurrent updates; decrease batch size for the daemon
reduce daemon chattiness a bit
unify houskeeping stuff, increase spawn interval
do not try to draw a fail-gradient (faildient?)
correct faildient case