lei_mirror: add a hint for skipped epoch permissions

Some users may think it's git-specific thing to enable
writability, rather than a *nix permissions thing.  Clarify that
it's a standard *nix thing.

diff --git a/lib/PublicInbox/LeiMirror.pm b/lib/PublicInbox/LeiMirror.pm
index 150b42966521b97906418bbf9496a23c093dead3..eaffb8fac631a57ebfc5468fa1c136ed11ed0174 100644 (file)
--- a/lib/PublicInbox/LeiMirror.pm
+++ b/lib/PublicInbox/LeiMirror.pm
@@ -303,6 +303,7 @@ sub init_placeholder ($$) {
 
 ; This git epoch was created read-only and "public-inbox-fetch"
 ; will not fetch updates for it unless write permission is added.
+; Hint: chmod +w $edst
 EOM
        close $fh or die "close:($f): $!";
 }