Merge with MYSQL 5.1.61

Fixed README with link to source
Merged InnoDB change to XtraDB

README:
  Added information of where to find MariaDB code
storage/archive/ha_archive.cc:
  Removed memset() of rows, a MariaDB checksum's doesn't touch not used data.

cmd-line-utils/libedit/chartype.h

@@ -45,11 +45,11 @@
  * seems to actually advertise this properly, despite Unicode 3.1 having
  * been around since 2001... */
 
-/* XXXMYSQL : Added FreeBSD to bypass this check.
-  TODO : Verify if FreeBSD stores ISO 10646 in wchar_t. */
+/* XXXMYSQL : Added FreeBSD & AIX to bypass this check.
+  TODO : Verify if FreeBSD & AIX stores ISO 10646 in wchar_t. */
 #if !defined(__NetBSD__) && !defined(__sun) \
   && !(defined(__APPLE__) && defined(__MACH__)) \
-  && !defined(__FreeBSD__)
+  && !defined(__FreeBSD__) && !defined(_AIX)
 #ifndef __STDC_ISO_10646__
 /* In many places it is assumed that the first 127 code points are ASCII
  * compatible, so ensure wchar_t indeed does ISO 10646 and not some other

cmd-line-utils/libedit/eln.c

@@ -200,7 +200,7 @@ el_set(EditLine *el, int op, ...)
 		    ret = -1;
 		    goto out;
 		}
-		// XXX: The two strdup's leak
+                /* XXX: The two strdups leak. */
 		ret = map_addfunc(el, Strdup(wargv[0]), Strdup(wargv[1]),
 		    func);
 		ct_free_argv(wargv);

cmd-line-utils/libedit/readline.c

@@ -1978,7 +1978,7 @@ rl_callback_read_char()
 		} else
 			wbuf = NULL;
 		(*(void (*)(const char *))rl_linefunc)(wbuf);
-		//el_set(e, EL_UNBUFFERED, 1);
+                /*el_set(e, EL_UNBUFFERED, 1);*/
 	}
 }