Use correct OpenSSL thread safety macros on OS X (closes #209) Create an Autoconf test to determine if pthread_t is a pointer or scalar type, and use the appropriate CRYPTO_THREADID_set macro based on the result.

table user : {A : int}

fun main () =
    r <- oneRow (SELECT COUNT( * ) AS N FROM user);
    return <xml>{[r.N]}</xml>