Description:
------------
mysql_enable_rpl_parse() changes (breaks) mysql connect struct somehow, so that after using this function MySQLi crashes on shutdown, or on mysql connect struct destruction to be precise.
Not sure if the problem is in MySQLi or on libmysqlclient, but the latter seems to be more likely. 

Reproduce code:
---------------
<?php
 //See ext/mysqli/tests/mysqli_enable_rpl_parse.phpt.
    include "connect.inc";
    $link = mysqli_connect($host, $user, $passwd, $db, $port, $socket));
    mysqli_enable_rpl_parse($link);
?>

Expected result:
----------------
.

Actual result:
--------------
GDB backtrace:
--------------
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 47731063565936 (LWP 12002)]
0x0000000000894869 in zend_mm_check_ptr (heap=0xecb2c0, ptr=0x10c7b68, silent=1, __zend_filename=0xc1f738 "/local/qa/5_3/Zend/zend_opcode.c",
    __zend_lineno=258, __zend_orig_filename=0x0, __zend_orig_lineno=0) at /local/qa/5_3/Zend/zend_alloc.c:1409
1409                    if (memcmp(end_magic, &_mem_block_end_magic, END_MAGIC_SIZE)==0) {
(gdb) bt
#0  0x0000000000894869 in zend_mm_check_ptr (heap=0xecb2c0, ptr=0x10c7b68, silent=1, __zend_filename=0xc1f738 "/local/qa/5_3/Zend/zend_opcode.c",
    __zend_lineno=258, __zend_orig_filename=0x0, __zend_orig_lineno=0) at /local/qa/5_3/Zend/zend_alloc.c:1409
#1  0x0000000000895bba in _zend_mm_free_int (heap=0xecb2c0, p=0x10c7b68, __zend_filename=0xc1f738 "/local/qa/5_3/Zend/zend_opcode.c", __zend_lineno=258,
    __zend_orig_filename=0x0, __zend_orig_lineno=0) at /local/qa/5_3/Zend/zend_alloc.c:1897
#2  0x00000000008972a7 in _efree (ptr=0x10c7b68, __zend_filename=0xc1f738 "/local/qa/5_3/Zend/zend_opcode.c", __zend_lineno=258, __zend_orig_filename=0x0,
    __zend_orig_lineno=0) at /local/qa/5_3/Zend/zend_alloc.c:2265
#3  0x00000000008ae237 in destroy_op_array (op_array=0x10c77b0) at /local/qa/5_3/Zend/zend_opcode.c:258
#4  0x00000000008b9f54 in zend_execute_scripts (type=8, retval=0x0, file_count=3) at /local/qa/5_3/Zend/zend.c:1174
#5  0x000000000085afda in php_execute_script (primary_file=0x7fff6d82a840) at /local/qa/5_3/main/main.c:2007
#6  0x000000000094e614 in main (argc=2, argv=0x7fff6d82aa78) at /local/qa/5_3/sapi/cli/php_cli.c:1140

Valgrind log:
-------------
==12007== Invalid free() / delete / delete[]
==12007==    at 0x4C226DB: free (in /usr/lib64/valgrind/amd64-linux/vgpreload_memcheck.so)
==12007==    by 0x7CFF30C: (within /usr/lib64/libmysqlclient.so.15.0.0)
==12007==    by 0x7CFF609: mysql_close (in /usr/lib64/libmysqlclient.so.15.0.0)
==12007==    by 0x5FF20B: mysqli_link_free_storage (mysqli.c:237)
==12007==    by 0x8E2685: zend_objects_store_del_ref_by_handle (zend_objects_API.c:206)
==12007==    by 0x8E24D5: zend_objects_store_del_ref (zend_objects_API.c:168)
==12007==    by 0x8B754D: _zval_dtor_func (zend_variables.c:52)
==12007==    by 0x8A7BBB: _zval_dtor (zend_variables.h:35)
==12007==    by 0x8A7DE3: _zval_ptr_dtor (zend_execute_API.c:415)
==12007==    by 0x8B78D3: _zval_ptr_dtor_wrapper (zend_variables.c:175)
==12007==    by 0x8C847D: zend_hash_apply_deleter (zend_hash.c:611)
==12007==    by 0x8C8AB3: zend_hash_reverse_apply (zend_hash.c:760)
==12007==    by 0x8A77BC: shutdown_destructors (zend_execute_API.c:212)
==12007==    by 0x8B8FCA: zend_call_destructors (zend.c:848)
==12007==    by 0x85A1D3: php_request_shutdown (main.c:1447)
==12007==    by 0x94EF2D: main (php_cli.c:1321)