v2.0.2-rc (#27)

## v2.0.2-rc

### BREAKING CHANGES

* Refactored `config.json` - will need to verify configuration settings prior to mounting

### Issues

* \#12 \[Unit Test\] Complete all providers unit tests
* \#14 \[Unit Test\] SQLite mini-ORM unit tests and cleanup
* \#16 Add support for bucket name in Sia provider
* \#17 Update to common c++ build system
  * A single 64-bit Linux Jenkins server is used to build all Linux and Windows versions
  * All dependency sources are now included
  * MSVC is no longer supported
  * MSYS2 is required for building Windows binaries on Windows
  * OS X support is temporarily disabled
* \#19 \[bug\] Rename file is broken for files that are existing
* \#23 \[bug\] Incorrect file size displayed while upload is pending
* \#24 RocksDB implementations should be transactional
* \#25 Writes should block when maximum cache size is reached
* \#26 Complete ring buffer and direct download support

### Changes from v2.0.1-rc

* Ability to choose between RocksDB and SQLite databases
* Added direct reads and implemented download fallback
* Corrected file times on S3 and Sia providers
* Corrected handling of `chown()` and `chmod()`
* Fixed erroneous download of chunks after resize

Reviewed-on: #27

cmake/libraries/openssl.cmake

@@ -0,0 +1,53 @@
+set(OPENSSL_ROOT_DIR $ENV{OPENSSL_ROOT_DIR})
+
+if(PROJECT_ENABLE_OPENSSL)
+  if(PROJECT_BUILD)
+    add_definitions(-DPROJECT_ENABLE_OPENSSL)
+
+    find_package(OpenSSL ${OPENSSL_VERSION} REQUIRED)
+
+    include_directories(BEFORE SYSTEM ${OPENSSL_INCLUDE_DIR})
+
+    link_libraries(
+      OpenSSL::Crypto
+      OpenSSL::SSL
+    )
+  elseif(NOT PROJECT_IS_MINGW)
+    if(PROJECT_IS_MINGW)
+      set(OPENSSL_COMPILE_TYPE mingw64)
+    elseif(PROJECT_IS_ARM64)
+      set(OPENSSL_COMPILE_TYPE linux-aarch64)
+    else()
+      set(OPENSSL_COMPILE_TYPE linux-x86_64)
+    endif()
+
+    if(PROJECT_IS_MINGW_UNIX)
+      set(OPENSSL_CROSS_PREFIX "--cross-compile-prefix=x86_64-w64-mingw32-")
+    endif()
+
+    if(PROJECT_BUILD_SHARED_LIBS)
+      set(OPENSSL_NO_SHARED shared)
+    else()
+      set(OPENSSL_NO_SHARED no-shared)
+    endif()
+
+    ExternalProject_Add(openssl_project
+      PREFIX external
+      URL ${PROJECT_3RD_PARTY_DIR}/openssl-${OPENSSL_VERSION}.tar.gz
+      URL_HASH SHA256=${OPENSSL_HASH}
+      BUILD_IN_SOURCE 1
+      LIST_SEPARATOR |
+      CONFIGURE_COMMAND ./Configure 
+        ${OPENSSL_COMPILE_TYPE} 
+        ${OPENSSL_CROSS_PREFIX}
+        --prefix=${PROJECT_EXTERNAL_BUILD_ROOT}
+        no-apps
+        no-docs
+        ${OPENSSL_NO_SHARED}
+      BUILD_COMMAND make -j1
+      INSTALL_COMMAND make install
+    )
+
+    list(APPEND PROJECT_DEPENDENCIES openssl_project)
+  endif()
+endif()