Add CentOS 7.6

sql/schema.sql

@@ -236,7 +236,8 @@ INSERT INTO systems (id, name, release, short, relorder) VALUES
   (183,'CentOS',     '6.10',  'centos-6.10',     43),
   (184,'FreeBSD',    '11.2',  'freebsd-11.2',    63),
   (185,'Ubuntu',     '18.10', 'ubuntu-cosmic',   28),
-  (186,'Fedora',     '29',    'fedora-29',       28);
+  (186,'Fedora',     '29',    'fedora-29',       28),
+  (187,'CentOS',     '7.6',   'centos-7.6',      50);
 
 
 -- Removes any path components and compression extensions from the filename.

util/centos.sh

@@ -183,6 +183,9 @@ case "$1" in
     7.5)
         centc 7.5 7.5.1804 $CMIRROR
         ;;
+    7.6)
+        centc 7.6 7.6.1810 $CMIRROR
+        ;;
     old)
         $0 2.1
         $0 3.1
@@ -231,10 +234,11 @@ case "$1" in
         $0 7.2
         $0 7.3
         $0 7.4
+        $0 7.5
         ;;
     current)
         $0 6.10 # till 2020-11-30
-        $0 7.5  # till 2024-06-30
+        $0 7.6  # till 2024-06-30
         ;;
     all)
         $0 old