eos fid are encoded in hexadecimal on at least 8 characters on the FST

this fixes #982 where files with fid >4294967295 were not considered for
garbage collection.

ReleaseNotes.md

@@ -17,6 +17,7 @@
 - cta/CTA#969 `xrdfs query prepare` malformed JSON output 
 - cta/CTA#972 Updates cta-taped and rmcd man pages
 - cta/CTA#967 CI DB cleanup issues
+- cta/CTA#982 cta-fst-gcd ignored eos files with fid>4294967295
 
 # v4.0-1
 

python/eosfstgcd/ctafstgcd.py

@@ -429,7 +429,7 @@ class Gc:
     except Exception as err:
       self.log.error('process_fs_sub_dir: Failed to list contents of sub directory: sub_dir={}: {}'.format(sub_dir, err))
 
-    fst_files = [f for f in sub_dir_files if re.match('^[0-9A-Fa-f]{8,9}$', f) and self.disk.isfile(os.path.join(sub_dir, f))]
+    fst_files = [f for f in sub_dir_files if re.match('^[0-9A-Fa-f]{8,}$', f) and self.disk.isfile(os.path.join(sub_dir, f))]
     for fst_file in fst_files:
       self.process_file(sub_dir, fst_file, eos_space)