Merge #13662: Explain when reindex-chainstate can be used instead of reindex

65a449f8e3 Explain when reindex-chainstate can be used instead of reindex (Sjors Provoost)

Pull request description:

  Save users from having to Google this: https://bitcoin.stackexchange.com/a/60711

Tree-SHA512: 3128565d037c77265a2ecf3bce137b8d27740f513802a4e683be06f21a75b82ee6cc22eb903181c4f438a2990cb682ce1d076f4d3af33d5aaa79b783a9f664b1

src/init.cpp

@@ -388,7 +388,7 @@ void SetupServerArgs()
             "Warning: Reverting this setting requires re-downloading the entire blockchain. "
             "(default: 0 = disable pruning blocks, 1 = allow manual pruning via RPC, >=%u = automatically prune block files to stay under the specified target size in MiB)", MIN_DISK_SPACE_FOR_BLOCK_FILES / 1024 / 1024), false, OptionsCategory::OPTIONS);
     gArgs.AddArg("-reindex", "Rebuild chain state and block index from the blk*.dat files on disk", false, OptionsCategory::OPTIONS);
-    gArgs.AddArg("-reindex-chainstate", "Rebuild chain state from the currently indexed blocks", false, OptionsCategory::OPTIONS);
+    gArgs.AddArg("-reindex-chainstate", "Rebuild chain state from the currently indexed blocks. When in pruning mode or if blocks on disk might be corrupted, use full -reindex instead.", false, OptionsCategory::OPTIONS);
 #ifndef WIN32
     gArgs.AddArg("-sysperms", "Create new files with system default permissions, instead of umask 077 (only effective with disabled wallet functionality)", false, OptionsCategory::OPTIONS);
 #else