s/^( *fallback_to_local_locking) = .*$/$1 = 0/m or die;
s/^( *)# *(locking_library.*)$/$1$2/m or die;
s/^( *)# *(library_dir.*)$/$1$2/m or die;
s/^( *fallback_to_local_locking) = .*$/$1 = 0/m or die;
s/^( *)# *(locking_library.*)$/$1$2/m or die;
s/^( *)# *(library_dir.*)$/$1$2/m or die;