New command -iso_nowtime to set fixed timestamp for synthetic files

xorriso/xorrisofs.info

@@ -1865,7 +1865,9 @@ is supposed to be either undefined or to contain a decimal number which
 tells the seconds since january 1st 1970.  If it contains a number, then
 it is used as time value to set the default of --modification-date=.
 --gpt_disk_guid defaults to "modification-date".  The default of
---set_all_file_dates is then "set_to_mtime".
+--set_all_file_dates is then "set_to_mtime".  Further the "now" time for
+ISO nodes without disk source is then set to the SOURCE_DATE_EPOCH
+value.
 Startup files and program options can override the effect of
 SOURCE_DATE_EPOCH.
 
@@ -2427,10 +2429,10 @@ Node: ExIncBckAcc78902
 Node: ExBootable80607
 Node: Files84789
 Node: Environ85884
-Node: Seealso86655
-Node: Bugreport87306
-Node: Legal87899
-Node: CommandIdx88796
-Node: ConceptIdx104663
+Node: Seealso86757
+Node: Bugreport87408
+Node: Legal88001
+Node: CommandIdx88898
+Node: ConceptIdx104765
 
 End Tag Table