Revert "Merge pull request 'Merge all 5 batch PRs: security, CLI features, protocol, performance, tests/docs' (#143) from merge-all-v2 into main"

This reverts commit 29f4f8cde6, reversing
changes made to c6bf7bb84e.

src/shared/file.h

@@ -20,7 +20,8 @@ typedef struct {
   char* path;
   Data* data;
   FileMetadata* metadata;
-  bool skip;
+  FileType type;
+  char* link_target;
 } File;
 
 File* file_create(const char* path);
@@ -35,7 +36,7 @@ size_t file_content_to_buffer(File* file);
 FileMetadata* file_metadata_create(const struct stat* stats);
 void file_metadata_destroy(void* metadata);
 bool to_disk(const char* path, const void* data, unsigned long long data_size);
-bool file_save_to_disk(const char* root_directory, File* file, const Config* config);
+bool file_save_to_disk(const char* root_directory, File* file);
 File* receive_incremental_check(int fd, const Config* config, bool* skipped);
 int receive_manifest(int fd, const Config* config, int* next_status);