i2pd-specific changes to I2P protocols

SAM

SESSION CREATE and DEST GENERATE support additional parameter CRYPTO_TYPE specifing crypto type for new local destination

I2PControl

i2p.router.status is 1 if shared local destination is ready, and 0 if not
i2p.router.net.tunnels.successrate returns tunnel creation success rate in percents

BOB

newkeys . DSA and ElGamal by default