Merge pull request #6135

f13dac9 Comment edits and cleanup (BitcoinPRReadingGroup)
ff734e9 Alphabetic order in makefile (Jorge Timón)
5207f33 fix header include groups (Philip Kaufmann)
59b149f remove unneeded incude of wallet/db.h from rpcmining.cpp (Philip Kaufmann)
3703385 remove unused classes from db.h (Philip Kaufmann)
0a7bcb7 fix IDE/compiler warning "extra ';'" in validationinterface.h (Philip Kaufmann)
3b00e7c [Trivial] Update COPYING (sandakersmann)
dd9e688 Trivial: Corrected owner of DNS seeder (ayeowch)
a60bfd8 [init] better message when no wallet support is compiled in (Philip Kaufmann)
78f44b6 Capitalized P2P (sandakersmann)
8e9248d [Trivial] Cryptocurrency is one word (sandakersmann)
803f51e Typo in GetRawMemPool RPC method help: "]" --> "}" (Chris Arnesen)
605a735 addrman: update comments (Pavel Vasin)