First, I am not sure now that the problem with GB2312 was on a test server before reload of system. Perhaps, it always worked correctly. In any case, it has no errors log.
On the work server the error log present. As I understand, the record
[23-Sep-2016 10:48:49 Europe/Moscow] PHP Notice: No suitable function found for UTF-8 encoding in /var/www/html/mail/program/lib/Roundcube/rcube_charset.php on line 276
has a direct bearing on my problems with G2312. What does it mean?
Secondly, on this server in a log there is a group of the errors relating to spell-checker.
[23-Sep-2016 10:24:05 Europe/Moscow] PHP Warning: fsockopen(): SSL operation failed with code 1. OpenSSL Error messages: error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed in /var/www/html/mail/program/lib/Roundcube/rcube_spellcheck_googie.php on line 87 [23-Sep-2016 10:24:05 Europe/Moscow] PHP Warning: fsockopen(): Failed to enable crypto in /var/www/html/mail/program/lib/Roundcube/rcube_spellcheck_googie.php on line 87 [23-Sep-2016 10:24:05 Europe/Moscow] PHP Warning: fsockopen(): unable to connect to ssl://spell.roundcube.net:443 (Unknown error) in /var/www/html/mail/program/lib/Roundcube/rcube_spellcheck_googie.php on line 87
Thirdly, after the Linux updating RC ceased to work at the work server. More precisely, the authentication page opens and works normally. The wrong password is processed normally. But after input of the correct password the RC page doesn't open, and the browser (Chrome) reports ERR_EMPTY_RESPONSE. In the RC error log there is no diagnostics about it.
I will be grateful for any consultations on search of the reasons of this failure. Updating of Linux was very big.
One more question which doesn't have a direct relation on RC, but here are specialists in e-mail. Perhaps, somebody will be so kind that he will answer. In case of attachment of the file in the letter the title in which cyrillic is encoded quite peculiar is created.
Content-Disposition: attachment; filename*0*=UTF-8''%D0%9E%D1%82...
I can't find the function which is realizing such coding or descriptions of the standard. I just don't know that I should look for. How this coding is named?