Disabled Pptpd and Openvpn definitions on Darwin.

Signed-off-by: Daniel (dmilith) Dettlaff <dmilith@verknowsys.com>
Re-enabled Python-legacy build on Darwin.

Signed-off-by: Daniel (dmilith) Dettlaff <dmilith@verknowsys.com>
Removed Darwin hacks for Scons and Mercurial definitions.

Signed-off-by: Daniel (dmilith) Dettlaff <dmilith@verknowsys.com>
Fixed Python definition with bad path to curl.

Signed-off-by: Daniel (dmilith) Dettlaff <dmilith@verknowsys.com>