Allow explicit UDP port option, confine ports to range 60000..61000

src/crypto/crypto.cc

@@ -30,7 +30,7 @@ using namespace Crypto;
 
 const char rdev[] = "/dev/urandom";
 
-long int myatoi( char *str )
+long int myatoi( const char *str )
 {
   char *end;
 

src/crypto/crypto.h

@@ -26,7 +26,7 @@
 
 using std::string;
 
-long int myatoi( char *str );
+long int myatoi( const char *str );
 
 namespace Crypto {
   class CryptoException {