Added MIN and MAX functions for operand.

tests/testjet.jet

@@ -64,9 +64,19 @@
  </for>
  <call error="rc" pgm="/usr/bin/ls" arg1="-al" name="ls" />
  $[rc]
+ <set name="max" expr="max(1, 2, 3, 4, 5, 4, 3, 2, 1)" />
+ max=$[max]
+ <set name="max" expr="max('A', 'B', 'C', 'D', 'E', 'D', 'C', 'B', 'A')" />
+ max=$[max]
+ <set name="min" expr="min(1, 2, 3, 4, 5, 4, 3, 2, 1)" />
+ min=$[min]
+ <set name="min" expr="min('A', 'B', 'C', 'D', 'E', 'D', 'C', 'B', 'A')" />
+ min=$[min]
+ <comment>
  $[ls]
  <read file="../compile" name="file" />
  $[file]
+ </comment>
  <comment>
  <whiledir path="/var/www" filename="file" fullpath="fullpath" filenamenoextension="noext" sort="true">
   $[file] $[fullpath] $[noext]