### Description
I can see this error during db_mysql compilation on CentOS 7 ``` CC (gcc) [M db_mysql.so] km_dbase.o CC (gcc) [M db_mysql.so] km_val.o CC (gcc) [M db_mysql.so] km_row.o CC (gcc) [M db_mysql.so] km_my_con.o km_my_con.c: In function 'db_mysql_new_connection': km_my_con.c:183:15: error: 'MYSQL_OPT_SSL_CA' undeclared (first use in this function) ptr->con, MYSQL_OPT_SSL_CA, (const void *)db_mysql_opt_ssl_ca); ^ km_my_con.c:183:15: note: each undeclared identifier is reported only once for each function it appears in make[2]: *** [km_my_con.o] Error 1 make[1]: *** [modules] Error 1 make[1]: Leaving directory `/root/rpmbuild/BUILD/kamailio-5.8.1/src' make: *** [every-module] Error 2 ```
This for 5.8.1 release.