allow to change local files

- fuse/filecache:
     * add filecache_upload_patch
     * allow opening files in modes other than RDONLY
 - fuse/hashtbl:
     * add folder_tree_upload_patch
 - fuse/operations:
     * allow opening files in modes other than RDONLY
     * add members to private context which allow tracking of
       not-yet-uploaded files and files opened for writing and
       files opened in read-only mode
 - mfapi/apicalls/upload_patch:
     * supply x-filename and x-filesize headers
 - mfapi/apicalls/upload_simple:
     * do not supply the x-filehash header as it is not used by the
       server
 - utils/hash:
     * hex characters must be lower case for the server
 - utils/strings:
     * clean up unused functions strdup_join, strdup_substr,
       string_chomp
 - utils/stringv:
     * complete rewrite with different string vector implementation

fuse/main.c

@@ -41,6 +41,7 @@
 #include "hashtbl.h"
 #include "operations.h"
 #include "../utils/strings.h"
+#include "../utils/stringv.h"
 
 enum {
     KEY_HELP,
@@ -410,8 +411,8 @@ int main(int argc, char *argv[])
 
     connect_mf(&options, ctx);
 
-    ctx->tmpfiles = NULL;
-    ctx->num_tmpfiles = 0;
+    ctx->sv_writefiles = stringv_alloc();
+    ctx->sv_readonlyfiles = stringv_alloc();
 
     ret = fuse_main(argc, argv, &mediafirefs_oper, ctx);
 
@@ -423,6 +424,8 @@ int main(int argc, char *argv[])
     free(ctx->configfile);
     free(ctx->dircache);
     free(ctx->filecache);
+    stringv_free(ctx->sv_writefiles);
+    stringv_free(ctx->sv_readonlyfiles);
     free(ctx);
 
     return ret;