Description:
------------
I was trying to get a simple script to work which simply opened a connection to the mail server and then closed it but when I ran the script it caused a segmentation fault on the imap_open line.

Reproduce code:
---------------
<?php
  $mailbox = '{mail.hddbroker.com:143}INBOX';
  $username = 'xxx';
  $password = 'yyy';

  $mbox = imap_open($mailbox, $username, $password);
  imap_close($mbox);
?>

If I run the script via the CLI version of PHP it prints "Segmentation fault (core dumped)".  If I run the script via a web server, an empty page is returned.

Expected result:
----------------
In this particular script I expected the imap_open function to return a resource object.

Actual result:
--------------
I configured my PHP with --enable-debug and followed the steps to get the following backtrace:

#0  0x00144019 in SSL_SESSION_hash () from /lib/libssl.so.4
#1  0x001ca484 in lh_free () from /lib/libcrypto.so.4
#2  0x001ca5f3 in lh_delete () from /lib/libcrypto.so.4
#3  0x00148141 in SSL_CTX_get_timeout () from /lib/libssl.so.4
#4  0x001ca56e in lh_retrieve () from /lib/libcrypto.so.4
#5  0x001481f7 in SSL_CTX_flush_sessions () from /lib/libssl.so.4
#6  0x001441a3 in SSL_CTX_free () from /lib/libssl.so.4
#7  0x005185ac in ssl_close () from /usr/lib/libc-client.so.0
#8  0x0051851f in ssl_close () from /usr/lib/libc-client.so.0
#9  0x005176c3 in ssl_aopen () from /usr/lib/libc-client.so.0
#10 0x0054a697 in imap_open () from /usr/lib/libc-client.so.0
#11 0x00523a90 in mail_open () from /usr/lib/libc-client.so.0
#12 0x0814dcfc in zif_imap_open (ht=3, return_value=0xb7c8bc9c, return_value_ptr=0x0, this_ptr=0x0, return_value_used=1)
    at /usr/local/src/php-5.2.0/ext/imap/php_imap.c:780
#13 0x08332c92 in zend_do_fcall_common_helper_SPEC (execute_data=0xbfe372e0) at /usr/local/src/php-5.2.0/Zend/zend_vm_execute.h:200
#14 0x08332419 in execute (op_array=0xb7c8b68c) at /usr/local/src/php-5.2.0/Zend/zend_vm_execute.h:92
#15 0x0831aa9b in zend_execute_scripts (type=8, retval=0x0, file_count=3) at /usr/local/src/php-5.2.0/Zend/zend.c:1097
#16 0x082e4a51 in php_execute_script (primary_file=0xbfe397d0) at /usr/local/src/php-5.2.0/main/main.c:1758
#17 0x08393462 in main (argc=2, argv=0xbfe398a4) at /usr/local/src/php-5.2.0/sapi/cli/php_cli.c:1108