[SM-USERS] What's wrong in Squirrelmail OpenSuse 13.2?

[<re...@la...>]

Hi,
We have been successfully using squirrelmail as front end to our UW IMAP 
servers until a couple of days ago using the following combination:

   Squirrelmail version 1.5.2
   Apache version 2.4.6
   PHP version 5.4.20

When we upgraded the OS on our web server to OpenSuse 13.2, which implies 
(in bundle from YaST2 with dependencies checked)

   Squirrelmail version 1.5.2
   Apache version 2.4.10
   PHP version 5.6.1

we are not able anymore to login. We get the following error message:

   Error connecting to IMAP server: tls://imap-ifc.0:

and in /var/log/mail of *REMOTE* IMAP server we see the following error:

   Unexpected client disconnect, while reading line user=??? host=UNKNOWN

The IMAP server (UW IMAP4rev1 2007e.404 under OpenSuse 13.2) has not 
changed and is happily accepting connections (TLS/SSL ports 143/993) from 
other imap clients (alpine, thunderbird, Kmail) ... and from Squirrelmail 
(1.5.2 in bundle) of OpenSuse 13.1!

//////////////////////////////////////////
The problem is NOT the remote IMAP server!
\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\

With Squirrelmail these dependencies (both OpenSuse versions 13.1 and 
13.2) are installed:

php-gettext
php-session
mod_php_any
php-mbstring
php-iconv
php-ctype
php-hash
php-mcrypt
php-openssl
php-posix
php-sockets
rpmlib(CompressedFileNames) <= 3.0.4-1
rpmlib(PayloadFilesHavePrefix) <= 4.0-1
rpmlib(PayloadIsLzma) <= 4.4.6-1
rpmlib(PartialHardlinkSets) <= 4.0.4-1

...other informations... debug step by step...

Apparently the login form passes correctly the arguments to routine
sqimap_login in ./functions/imap_general.php, but the error is generated 
in routine sqimap_create_stream

Any ideas?

Thanks in advance
Roberto