added many rpc wallet tests

deleted the empty no throw test in rpc_wallet_tests line 65

fixed some comments

starting verify tests

finished verify message tests

changed some comments
[Qt] ensure payment request network matches client network

- replaces checks in SendCoinsDialog::handlePaymentRequest() that belong
  to PaymentServer (normal URIs are special cased, as only an isValid
  check is done on BTC addresses)
- prevents the client to handle payment requests that do not match the
  clients network and shows an error instead (mainly a problem with
  drag&drop payment requests onto the client window)
- includes some small comment changes also
Fix addnode "onetry": Connect with OpenNetworkConnection
Add CODESEPARATOR/FindAndDelete() tests
Fix incorrect checkpoint data for testnet3
remove CWallet::AddReserveKey which is never used
remove CTransaction::IsNewerThan which is never used
remove LogException( ) which is never used
remove LookupHostNumeric( ) which is never used
remove GetMedianTime( ) which is never used
remove CPubKey::VerifyCompact( ) which is never used
Remove unused imports in macdeploy script
add DEFAULT_UPNP constant in net

- as this is a shared Core/GUI setting, this makes it easier to keep them
  in sync (also no new includes are needed)
Doc: Always use absolute paths
Remove redundant c_str
Update test_main.cpp

i think should delete （#include "bitcoin-config.h"）。
Replace non-threadsafe strerror

Log the name of the error as well as the error code if a network problem
happens. This makes network troubleshooting more convenient.

Use thread-safe strerror_r and the WIN32 equivalent FormatMessage.
doc: Clarify wording about testing in README.md

Weaken and clarify the wording a bit, it currently implies that we get
more pull requests than we can ever handle which discourages
contribution.
Merge pull request #4166

b641c9c Fix addnode "onetry": Connect with OpenNetworkConnection (Cozz Lovan)
Merge pull request #4212

d90491a Update test_main.cpp (LongShao007)