Improve the sort function.

* grecs: Upgrade.
* lib/forlan.c (strtots): New function.
(func_sort): Rewrite.  The "sort" built-in takes two
optional arguments: a path to the node to use as a key,
and a string of flags that set the comparison function and
sorting order.
* lib/forlangrm.y: Bugfix in argument verification code.
* src/dscrsnap-cl.opt: Document filters.
* tests/sortnum.at: New file.
* tests/sortrevnum.at: New file.
* tests/sortstring.at: New file.
* tests/sortts.at: New file.
* tests/Makefile.am: Add new test cases.
* tests/testsuite.at: Likewise.

1 files changed, 0 insertions, 0 deletions

diff --git a/grecs b/grecs
-Subproject bef65e80588f71b1fe5247869e6cab20d334aa6
+Subproject 9cf45f0c658b583ee1ebdcb3d6345ad290993d6