CLEANUP: assorted typo fixes in the code and comments

This is 11th iteration of typo fixes
diff --git a/src/time.c b/src/time.c
index a6cfa8e..a665a85 100644
--- a/src/time.c
+++ b/src/time.c
@@ -169,7 +169,7 @@
  * An offset is used to adjust the current time (date), to have a monotonic time
  * (now). It must be global and thread-safe. But a timeval cannot be atomically
  * updated. So instead, we store it in a 64-bits integer (offset) whose 32 MSB
- * contain the signed seconds adjustment andthe 32 LSB contain the unsigned
+ * contain the signed seconds adjustment and the 32 LSB contain the unsigned
  * microsecond adjustment. We cannot use a timeval for this since it's never
  * clearly specified whether a timeval may hold negative values or not.
  */