Remove -- usage from session ID creation

Description

When a COOKIE ID containing the character sequence '--' is generated, mod_security thinks it's a SQL injection and returns a 404 error. This sequence should be avoided, or the '-' character could be replaced with '_'. However, the sequence '--' in the session ID creates a lot of problems.

SecRule REQUEST_COOKIES|!REQUEST_COOKIES:/__utm/|!REQUEST_COOKIES:/_pk_ref/|REQUEST_COOKIES_NAMES|ARGS_NAMES|ARGS|XML:/* "@rx (?:/\*!?|\*/|[';]--|--[\s\r\n\v\f]|--[^-]*?-|[^&-]#.*?[\s\r\n\v\f]|;?\\x00)" \

SecRule REQUEST_COOKIES|!REQUEST_COOKIES:/__utm/|!REQUEST_COOKIES:/_pk_ref/|REQUEST_COOKIES_NAMES|ARGS_NAMES|ARGS|XML:/* "(/\*!?|\*/|[';]--|--[\s\r\n\v\f]|(?:--[^-]*?-)|([^\-&])#.*?[\s\r\n\v\f]|;?\\x00)" "phase:2,rev:'2',ver:'OWASP_CRS/2.2.9',maturity:'8',accuracy:'8',\ id:'981231',t:none,t:urlDecodeUni,block,\ msg:'SQL Comment Sequence Detected.'\ ,severity:'2',capture,logdata:'Matched Data: %{TX.0} found within %{MATCHED_VAR_NAME}: %{MATCHED_VAR}',tag:'OWASP_CRS/WEB_ATTACK/SQL_INJECTION',tag:'WASCTC/WASC-19',tag:'OWASP_TOP_10/A1',tag:'OWASP_AppSensor/CIE1',tag:'PCI/6.5.2',setvar:tx.anomaly_score=+%{tx.critical_anomaly_score},setvar:tx.sql_injection_score=+1,setvar:'tx.msg=%{rule.msg}',setvar:tx.%{rule.id}-OWASP_CRS/WEB_ATTACK/SQL_INJECTION-%{matched_var_name}=%{tx.0}"

该 issue 未确定源文件或测试。首先定位 PHP 的会话 ID 生成入口，复现包含 '--' 的 COOKIE ID 生成，并确认已完成的更改可以阻止此序列，同时不会破坏会话 ID。