lib/util.c: actually write stream id to field when present
lib/cipher.h: fix compile with DEBUG_PRINT

remove unmatched end-of-comment */
made STREAM_ID_SIZE 4 bytes
removed an unused variable in src/hash.c
commented out unused timing variables in abc-ip.c
removed bugs and awkwardness relating to AES keys
freeing packet after send in xkeyr.c
removed some dead and long commented-out code
voa: warn when signing fails, abort when encryption fails
voa: test is_encoder based on last 4 argv[0] chars being "voas"
voa: add assert.h header
Merge branch 'master' into voice-over-allnet

Conflicts:
	src/lib/util.c