Add librsync port (#3119)

* Add librsync port

* [librsync] Fix missing close paren

ports/librsync/CONTROL

@@ -0,0 +1,3 @@
+Source: librsync
+Version: 2.0.2
+Description: librsync is a library for calculating and applying network deltas, with an interface designed to ease integration into diverse network applications.

ports/librsync/portfile.cmake

@@ -0,0 +1,39 @@
+include(vcpkg_common_functions)
+
+vcpkg_from_github(
+    OUT_SOURCE_PATH SOURCE_PATH
+    REPO librsync/librsync
+    REF v2.0.2
+    SHA512 5d2bc1d62b37e9ed7416203615d0a0e3c05c4c884b5da63eda10dd5c985845b500331bce226e4d45676729382c85b41528282e25d491afda31ba434ac0fefad7
+    HEAD_REF master
+)
+
+vcpkg_configure_cmake(
+    SOURCE_PATH ${SOURCE_PATH}
+    PREFER_NINJA
+    OPTIONS -DBUILD_RDIFF:BOOL=OFF
+            -DENABLE_COMPRESSION:BOOL=OFF
+            -DENABLE_TRACE:BOOL=OFF
+            -DCMAKE_WINDOWS_EXPORT_ALL_SYMBOLS:BOOL=ON
+)
+
+vcpkg_install_cmake()
+
+file(REMOVE_RECURSE ${CURRENT_PACKAGES_DIR}/debug/include)
+file(REMOVE_RECURSE ${CURRENT_PACKAGES_DIR}/debug/share)
+
+if(EXISTS ${CURRENT_PACKAGES_DIR}/lib/rsync.dll)
+    file(MAKE_DIRECTORY ${CURRENT_PACKAGES_DIR}/bin)
+    file(RENAME ${CURRENT_PACKAGES_DIR}/lib/rsync.dll ${CURRENT_PACKAGES_DIR}/bin/rsync.dll)
+endif()
+if(EXISTS ${CURRENT_PACKAGES_DIR}/debug/lib/rsync.dll)
+    file(MAKE_DIRECTORY ${CURRENT_PACKAGES_DIR}/debug/bin)
+    file(RENAME ${CURRENT_PACKAGES_DIR}/debug/lib/rsync.dll ${CURRENT_PACKAGES_DIR}/debug/bin/rsync.dll)
+endif()
+
+file(INSTALL
+    ${SOURCE_PATH}/COPYING
+    DESTINATION ${CURRENT_PACKAGES_DIR}/share/librsync RENAME copyright
+)
+
+vcpkg_copy_pdbs()