Merge pull request #6134
e304432 Pass reference to estimateSmartFee and cleanup whitespace (Suhas Daftuar)
56106a3 Expose RPC calls for estimatesmart functions (Alex Morcos)
e93a236 add estimateSmartFee to the unit test (Alex Morcos)
6303051 EstimateSmart functions consider mempool min fee (Alex Morcos)
f22ac4a Increase success threshold for fee estimation to 95% (Alex Morcos)
4fe2823 Change wallet and GUI code to use new smart fee estimation calls. (Alex Morcos)
22eca7d Add smart fee estimation functions (Alex Morcos)