remove subscriber sentinel whenever responding to subscribers (was apparently reusing free'd sentinels)
read-var-info for valgrind
cleaned up some superfluous function params
valgrind cores to ./coredump
add static clang analyzer to rebuild script
add gcc mudflap (doesn't get past ./configure)
testing debug messages and timeouts
more monolithic shmem lock while subscribing to channel
free subscriber sentinel, then unlock (doesn't actually change behavior)
something the clang analyzer dug up
remove old repetitive code for making etags
remove some unused vars
rebuild.sh: nicer clang analyzer invocation