Merge #15919: Remove unused OpenSSL includes to make it more clear where OpenSSL is used

a34081b7c3 Remove unused OpenSSL includes to make it more clear where OpenSSL is used (practicalswift)

Pull request description:

  Remove unused OpenSSL includes to make it more clear where OpenSSL is used.

  Before this patch:

  ```
  $ git grep '#include <openssl/' -- "*.cpp" "*.h"
  src/init.cpp:#include <openssl/crypto.h>
  src/qt/paymentrequestplus.cpp:#include <openssl/x509_vfy.h>
  src/qt/paymentrequestplus.h:#include <openssl/x509.h>
  src/qt/paymentserver.cpp:#include <openssl/x509_vfy.h>
  src/qt/rpcconsole.cpp:#include <openssl/crypto.h>
  src/qt/test/paymentservertests.cpp:#include <openssl/x509.h>
  src/qt/test/paymentservertests.cpp:#include <openssl/x509_vfy.h>
  src/qt/test/test_main.cpp:#include <openssl/ssl.h>
  src/qt/winshutdownmonitor.cpp:#include <openssl/rand.h>
  src/random.cpp:#include <openssl/err.h>
  src/random.cpp:#include <openssl/rand.h>
  src/random.cpp:#include <openssl/conf.h>
  src/test/crypto_tests.cpp:#include <openssl/aes.h>
  src/test/crypto_tests.cpp:#include <openssl/evp.h>
  ```

  After this patch:

  ```
  $ git grep '#include <openssl/' -- "*.cpp" "*.h"
  src/qt/paymentrequestplus.cpp:#include <openssl/x509_vfy.h>
  src/qt/paymentrequestplus.h:#include <openssl/x509.h>
  src/qt/paymentserver.cpp:#include <openssl/x509_vfy.h>
  src/qt/test/paymentservertests.cpp:#include <openssl/x509.h>
  src/qt/test/paymentservertests.cpp:#include <openssl/x509_vfy.h>
  src/qt/test/test_main.cpp:#include <openssl/ssl.h>
  src/qt/winshutdownmonitor.cpp:#include <openssl/rand.h>
  src/random.cpp:#include <openssl/err.h>
  src/random.cpp:#include <openssl/rand.h>
  src/random.cpp:#include <openssl/conf.h>
  ```

  Removed:
  * `src/init.cpp:#include <openssl/crypto.h>` (unused since 5ecfa36fd0 (2016))
  * `src/qt/rpcconsole.cpp:#include <openssl/crypto.h>` (unused since 5ecfa36fd0 (2016))
  * `src/test/crypto_tests.cpp:#include <openssl/aes.h>` (introduced unused in daa384120a (2015))
  * `src/test/crypto_tests.cpp:#include <openssl/evp.h>` (introduced unused in daa384120a (2015))

ACKs for commit a34081:
  MarcoFalke:
    utACK a34081b7c3
  real-or-random:
    utACK a34081b
  fanquake:
    utACK a34081b

Tree-SHA512: 8ab9699c063f2d0ed2d71738f20ac5c21336585f7f62fd3a4b23199a125ea3224725591d64171347465762181788fac1bc4ce13d8824090bf1a5ac71a66d6538

src/init.cpp

@@ -66,7 +66,6 @@
 #include <boost/algorithm/string/replace.hpp>
 #include <boost/algorithm/string/split.hpp>
 #include <boost/thread.hpp>
-#include <openssl/crypto.h>
 
 #if ENABLE_ZMQ
 #include <zmq/zmqabstractnotifier.h>

src/qt/rpcconsole.cpp

@@ -21,8 +21,6 @@
 #include <util/strencodings.h>
 #include <util/system.h>
 
-#include <openssl/crypto.h>
-
 #include <univalue.h>
 
 #ifdef ENABLE_WALLET

src/test/crypto_tests.cpp

@@ -18,8 +18,6 @@
 #include <vector>
 
 #include <boost/test/unit_test.hpp>
-#include <openssl/aes.h>
-#include <openssl/evp.h>
 
 BOOST_FIXTURE_TEST_SUITE(crypto_tests, BasicTestingSetup)