i2pd-specific changes to I2P protocols

SAM

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

new values for SIGNATURE_TYPE
GOST_GOSTR3411256_GOSTR3410CRYPTOPROA or 9
GOST_GOSTR3411512_GOSTR3410TC26A512 or 10

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

Unlike Java-I2P, i2pd keep supporting BOB with the following extensions
newkeys signaturetype cryptotype. DSA and ElGamal by default
lookuplocal - looks for LeaseSet with specified address in router's netdb