- started update to 2.4.0

- started update to 2.4.0
- removed obsolete ipv6,nolibs,link patches
- disabled setreuid,sec,frsize patches (probably obsolete)
- updated PLD,db,ac253 patches
- WARNING: ipv6 configuration options have changed... (trigger added)
  some standard configuration options must be updated too (by innupgrade?)

Changed files:
    inn-PLD.patch -> 1.4
    inn-ac253.patch -> 1.4
    inn-ac25x.patch -> 1.2
    inn-db.patch -> 1.2
    inn-ipv6.patch -> 1.4
    inn-link.patch -> 1.2
    inn-nolibs.patch -> 1.2
    inn.spec -> 1.131