Add SSL/TLS support on a existen imap server written in Qt5

I have an IMAP server written in Qt5 and i will add to it this SSL/TLS support. This code must 100% Qt5 : I give you this (small, very small) server source code and you modifi it to add this SSL / TLS / SSL-TLS support (you add it this STARTTLS command) SSL support (and this STARTTLS) must Multihoming (ie you can choose one or more IP addr to listen). ie : NOT this->listen(HostAddress:: Any, int port) but this->listen("IPV4, IPV6, other IPV4, other IPV6, ...", int port ; connection type = "TLS OR SSL OR NORMAL"); Example : Hostname|IP PORT SAFETY CERTIFICAT [login to view URL]|IPV6|IPV4 993 SSL c:\mailServer\cert\[login to view URL] [login to view URL]|IPV6|IPV4 995 TLS c:\mailServer\cert\[login to view URL] [login to view URL]|IPV6|IPV4 143 NO -> So an email client can connect to the domain [login to view URL] in "unsafe" (port 143) or "SSL" (port 993) or "TLS" (995) [login to view URL] 993 SSL c:\mailServer\cert\[login to view URL] [login to view URL] 995 TLS c:\mailServer\cert\[login to view URL] -> So an email client can connect to the domain [login to view URL] in secure mode: SSL or TLS [login to view URL] 143 NO So an email client can connect to the domain [login to view URL] in unsafe mode IPV6 (ex : 2001:0:5ef5:79fd:108b:204d:b136:3fb) 993 SSL c:\mailServer\cert\[login to view URL] IPV6 (ex : 2001:0:5ef5:79fd:108b:204d:b136:3fb) 995 TLS c:\mailServer\cert\[login to view URL] IPV6 (ex : 2001:0:5ef5:79fd:108b:204d:b136:3fb) 143 NO An email client can connect to the IPV6 in unsafe mode (143), SST (993) or TLS (995)