Bug fix: Split file directories (-split_size) were created with wrong permissions

xorriso/xorriso.texi

@@ -50,7 +50,7 @@
 @c man .\" First parameter, NAME, should be all caps
 @c man .\" Second parameter, SECTION, should be 1-8, maybe w/ subsection
 @c man .\" other parameters are allowed: see man(7), man(1)
-@c man .TH XORRISO 1 "Version 1.5.5, May 30, 2022"
+@c man .TH XORRISO 1 "Version 1.5.5, Jun 02, 2022"
 @c man .\" Please adjust this date whenever revising the manpage.
 @c man .\"
 @c man .\" Some roff macros, for reference:
@@ -1732,6 +1732,10 @@ E.g:
 @*
  /file/part_3_of_3_at_4094m_with_2047m_of_5753194821
 @*
+If the directory /file does no yet exist, then its permissions are not taken
+from directory /my/disk but rather from /my/disk/file with additional
+x-permission for those who have r-permission.
+@*
 While command -split_size is set larger than 0, and if all pieces of a file
 reside in the same ISO directory with no other files, and if the names look
 like above, then their ISO directory will be recognized and handled like a
@@ -2037,6 +2041,9 @@ FAILURE event.
 A well tested -split_size is 2047m. Sizes above -file_size_limit are not
 permissible.
 @*
+The newly created ISO directory inherits its permissions from the data file
+with additional x-permission for those who have r-permission.
+@*
 While command -split_size is set larger than 0 such a directory with split
 file pieces will be recognized and handled like a regular file by commands
 -compare* , -update*, and in overwrite situations. There are -osirrox