[master] ca9829339 Fix mode for JAIL_FIXFD_FILE in the unix jail

[Nils Goroll]

commit ca98293398db21f9392cce0c762afde37872badb
Author: Nils Goroll <nils.goroll at uplex.de>
Date:   Fri Mar 1 12:24:44 2024 +0100

    Fix mode for JAIL_FIXFD_FILE in the unix jail
    
    Very much looks like copy-pasta in ede8c3dbe84b131d7e1240f28f2eb16c2818c309
    
    JAIL_FIXFD_VSMMGT and JAIL_FIXFD_VSMWRK work on directories but,
    as the name implies, JAIL_FIXFD_FILE not.

diff --git a/bin/varnishd/mgt/mgt_jail_unix.c b/bin/varnishd/mgt/mgt_jail_unix.c
index d979c00f0..f84d63c2e 100644
--- a/bin/varnishd/mgt/mgt_jail_unix.c
+++ b/bin/varnishd/mgt/mgt_jail_unix.c
@@ -296,7 +296,7 @@ vju_fixfd(int fd, enum jail_fixfd_e what)
 
 	switch (what) {
 	case JAIL_FIXFD_FILE:
-		AZ(fchmod(fd, 0750));
+		AZ(fchmod(fd, 0600));
 		AZ(fchown(fd, vju_wrkuid, vju_wrkgid));
 		break;
 	case JAIL_FIXFD_VSMMGT: