Double-free in src/modules/rlm_eap/types/rlm_eap_tls/rlm_eap_tls.c causes crash on HUP

[Phil Mayers]

At least on RHEL4 with glibc 2.3.4-2.13, a double-free in the above file 
causes a crash on HUP in some circumstances. I've confirmed that 
removing this fixes the issue.

     459
     460                 free(conf->check_cert_cn);
     461                 free(conf->check_cert_cn);
     462                 free(conf->cipher_list);