Close down acceptable ciphers in server.
Added forgotten Copyright - License preamble.
Added "allowciphers" option in body server control.
Implement random calling of optimized OpenDB with an optional env var
Merge pull request #882 from tzz/tzz/evaluate3

Redmine#2111: eval() function for math evaluation
Merge pull request #932 from jeffali/port/TcOptimizeEnvVar

Implement random calling of optimized OpenDB with an optional env var
Add struct Class, ClassTable, use in EvalContext, replacing StringSet
Merge pull request #873 from jimis/master

TLS: closed down default cipher list, added "allowciphers" option in body server control.
Redmine#3251: add and remove GMT versions of all the hard time classes