Lots of doc corrections.

Josh Kupershmidt

src/backend/storage/file/reinit.c

@@ -345,7 +345,7 @@ ResetUnloggedRelationsInDbspaceDir(const char *dbspacedirname, int op)
 /*
  * Basic parsing of putative relation filenames.
  *
- * This funtion returns true if the file appears to be in the correct format
+ * This function returns true if the file appears to be in the correct format
  * for a non-temporary relation and false otherwise.
  *
  * NB: If this function returns true, the caller is entitled to assume that

src/backend/storage/ipc/procarray.c

@@ -279,10 +279,10 @@ ProcArrayAdd(PGPROC *proc)
 	/*
 	 * Keep the procs array sorted by (PGPROC *) so that we can utilize
 	 * locality of references much better. This is useful while traversing the
-	 * ProcArray because there is a increased likelyhood of finding the next
+	 * ProcArray because there is a increased likelihood of finding the next
 	 * PGPROC structure in the cache.
 	 * 
-	 * Since the occurance of adding/removing a proc is much lower than the
+	 * Since the occurrence of adding/removing a proc is much lower than the
 	 * access to the ProcArray itself, the overhead should be marginal
 	 */
 	for (index = 0; index < arrayP->numProcs; index++)

src/backend/storage/lmgr/predicate.c

@@ -1234,7 +1234,7 @@ InitPredicateLocks(void)
 	 * that this will prevent resource exhaustion in even the most pessimal
 	 * loads up to max_connections = 200 with all 200 connections pounding the
 	 * database with serializable transactions.  Beyond that, there may be
-	 * occassional transactions canceled when trying to flag conflicts. That's
+	 * occasional transactions canceled when trying to flag conflicts. That's
 	 * probably OK.
 	 */
 	max_table_size *= 5;