other: Fix several typos and minor errors

- duplicate words
- typos
- references to old versions of FreeBSD

Reviewed by:	imp, benno

UPDATING

@@ -821,7 +821,7 @@ NOTE TO PEOPLE WHO THINK THAT FreeBSD 12.x IS SLOW:
 
 20150623:
 	An additional fix for the issue described in the 20150614 sendmail
-	entry below has been been committed in revision 284717.
+	entry below has been committed in revision 284717.
 
 20150616:
 	FreeBSD's old make (fmake) has been removed from the system. It is
@@ -829,7 +829,7 @@ NOTE TO PEOPLE WHO THINK THAT FreeBSD 12.x IS SLOW:
 
 20150615:
 	The fix for the issue described in the 20150614 sendmail entry
-	below has been been committed in revision 284436.  The work
+	below has been committed in revision 284436.  The work
 	around described in that entry is no longer needed unless the
 	default setting is overridden by a confDH_PARAMETERS configuration
 	setting of '5' or pointing to a 512 bit DH parameter file.

sbin/devfs/rule.c

@@ -267,7 +267,7 @@ ruleset_main(int ac, char **av)
  * differs from the other rulespec_in*() routines in that it also
  * calls ioctl() for the rules, since it is impractical (and not very
  * useful) to return a list (or array) of rules, just so the caller
- * can call call ioctl() for each of them.
+ * can call ioctl() for each of them.
  */
 static void
 rulespec_infp(FILE *fp, unsigned long request, devfs_rsnum rsnum)

tests/sys/fifo/fifo_io.c

@@ -1178,7 +1178,7 @@ test_events_write_read_byte(void)
 	}
 
 	/*
-	 * Read the byte from the reader_fd, and now confirm that that fifo
+	 * Read the byte from the reader_fd, and now confirm that the fifo
 	 * becomes unreadable.
 	 */
 	len = read(reader_fd, &ch, sizeof(ch));

tests/sys/kern/ptrace_test.c

@@ -2958,7 +2958,7 @@ ATF_TC_BODY(ptrace__PT_CONTINUE_with_sigmask, tc)
 /*
  * Verify that if ptrace stops due to a signal but continues with
  * a different signal that the new signal is routed to a thread
- * that can accept it, and that that thread is awakened by the signal
+ * that can accept it, and that the thread is awakened by the signal
  * in a timely manner.
  */
 ATF_TC_WITHOUT_HEAD(ptrace__PT_CONTINUE_with_signal_thread_sigmask);

tools/regression/bpf/bpf_filter/bpf_test.c

@@ -149,7 +149,7 @@ bpf_validate(const struct bpf_insn *f, int len)
 		if (!BPF_VALIDATE_CODE(p->code))
 			return (0);
 		/*
-		 * Check that that jumps are forward, and within
+		 * Check that jumps are forward, and within
 		 * the code block.
 		 */
 		if (BPF_CLASS(p->code) == BPF_JMP) {