Many small updates to various scripts.

deleted:    cronjob-update-packages-list.new
deleted:    cronjob-updatedb-mirrors
renamed:    rsync-notify-upload -> notify-rsync-upload
modified:   colour-changelog
modified:   cronjob-clean-php
modified:   cronjob-dehydrated
modified:   cronjob-fix-log-acls
modified:   cronjob-rotate-logs-today-symlink
modified:   cronjob-update-mirrors-search-db
modified:   cronjob-update-packages-list
modified:   cronjob-warn-git-status
modified:   cronjob-warn-smtp-queue
modified:   do-backup
modified:   dovecot-service-checksuspended
modified:   firewall-initscript
modified:   git-auto-merge
modified:   mirror
modified:   mirror-new-slackware-release.gpg
modified:   mirror-wrapper
modified:   notify-rsync-upload
modified:   sbosrcarch-wrapper

cronjob-rotate-logs-today-symlink

@@ -1,4 +1,5 @@
 #!/bin/bash
+# Create a new symlink to today's logs, for ease of browsing.
 
 # Default configuration.
 LOGS_DIR="/data/logs"
@@ -10,23 +11,28 @@ LOGS_DIR="/data/logs"
   for DIR in "$LOGS_DIR"/*/; do
     cd "$DIR" 2>/dev/null || {
       printf "%s: %s\\n" "${0##*/}" "failed to change directory to '$DIR'" >&2
+      ERR=1
       continue
     }
 
+    # Logs are for root only.
+    umask 022
+
     # Create the new days' location.
-    umask 0755
     # shellcheck disable=SC2174
     mkdir -p -m 0755 "$LOGS_DIR/$TODAY" 2>/dev/null || {
       printf "%s: %s\\n" "${0##*/}" "failed to create directory '$LOGS_DIR/$TODAY'" >&2
+      ERR=1
       continue
     }
 
     # Create the 'today' symlink to the new location.
     ln -sfn "$TODAY" "today" 2>/dev/null || {
       printf "%s: %s\\n" "${0##*/}" "updating 'today' symlink failed in '$DIR'" >&2
+      ERR=1
       continue
     }
   done
 }
 
-exit 0
+exit "${ERR:-0}"