CLEANUP: assorted typo fixes in the code and comments

This is 8th iteration of typo fixes
diff --git a/include/types/stream.h b/include/types/stream.h
index 39a6855..0dcc541 100644
--- a/include/types/stream.h
+++ b/include/types/stream.h
@@ -105,7 +105,7 @@
 	int level;                      /* log level to force + 1 if > 0, -1 = no log */
 	struct timeval accept_date;     /* date of the stream's accept() in user date */
 	struct timeval tv_accept;       /* date of the stream's accept() in internal date (monotonic) */
-	long t_handshake;               /* hanshake duration, -1 if never occurs */
+	long t_handshake;               /* handshake duration, -1 if never occurs */
 	long t_idle;                    /* idle duration, -1 if never occurs */
 	struct timeval tv_request;      /* date the request arrives, {0,0} if never occurs */
 	long  t_queue;                  /* delay before the stream gets out of the connect queue, -1 if never occurs */