Log Message:
Updated to version 1.18.

Pkgsrc changes:
  - Used author-independent URL for HOMEPAGE.
  - The package supports installation to DESTDIR.
  - A C compiler is not required.

Changes since version 1.15:
===========================
1.18  Mar 31, 2008
- Fix a test failure on Win32. No changes to the non-test code.

1.17  Mar 30, 2008
- Added a max_arg_length parameter, which if set causes
  Devel::StackTrace to truncate long strings when printing out a
  frame. RT #33519. Patch by Ian Burrell.

1.16  Feb 2, 2008
- A test fix for bleadperl. The value of wantarray from caller() needs
  to be treated as a boolean, as opposed to expecting 0 (vs
  undef). RT #32583. Patch by Jerry Hedden.