blockchain_utilities: new blockchain_blackball tool

It scans for known spent outputs and stores their public keys
in a database which can then be read by the wallet, which can
then avoid using those as fake outs in new transactions.

Usage: monero-blockchain-blackball db1 db2...

This uses the shared database in ~/.shared-ringdb

src/blockchain_utilities/CMakeLists.txt

@@ -67,6 +67,20 @@ monero_private_headers(blockchain_export
 	  ${blockchain_export_private_headers})
 
 
+set(blockchain_blackball_sources
+  blockchain_blackball.cpp
+  )
+
+set(blockchain_blackball_private_headers
+  bootstrap_file.h
+  blocksdat_file.h
+  bootstrap_serialization.h
+  )
+
+monero_private_headers(blockchain_blackball
+	  ${blockchain_blackball_private_headers})
+
+
 monero_add_executable(blockchain_import
   ${blockchain_import_sources}
   ${blockchain_import_private_headers}
@@ -117,3 +131,26 @@ set_property(TARGET blockchain_export
 	OUTPUT_NAME "monero-blockchain-export")
 install(TARGETS blockchain_export DESTINATION bin)
 
+monero_add_executable(blockchain_blackball
+  ${blockchain_blackball_sources}
+  ${blockchain_blackball_private_headers})
+
+target_link_libraries(blockchain_blackball
+  PRIVATE
+    wallet
+    cryptonote_core
+    blockchain_db
+    p2p
+    version
+    epee
+    ${Boost_FILESYSTEM_LIBRARY}
+    ${Boost_SYSTEM_LIBRARY}
+    ${Boost_THREAD_LIBRARY}
+    ${CMAKE_THREAD_LIBS_INIT}
+    ${EXTRA_LIBRARIES})
+
+set_property(TARGET blockchain_blackball
+	PROPERTY
+	OUTPUT_NAME "monero-blockchain-blackball")
+install(TARGETS blockchain_blackball DESTINATION bin)
+