cscope security update

[15.5-15.1.el5_3.1]

• Release bump to create newer nvr despite dist tag change (fc6 -> el5)
  [15.5-15.el5_3.4]
• Merge incdir-overflow and snprintf patches for better readability,
  snprintf is used now with PATHLEN limit without other adjustments,
  related strlen / %.*s / *_len are no longer needed and were dropped
• Update tempsec patch, drop extraneous s(n)printf argument
  to suppress compiler warnings
• Update fscanf-overflows patch to perform reffile argument length
  check earlier, now also includes strlen-adjust-fix patch
  [15.5-15.el5_3.3]
• Correcting buffer overflow fix (bz 499200)
  [15.5-15.el5_3.2]
• Fix some buffer overflows (bz 499200)