Log message:
Simply and speed up buildlink3.mk files and processing.
This changes the buildlink3.mk files to use an include guard for the
recursive include. The use of BUILDLINK_DEPTH, BUILDLINK_DEPENDS,
BUILDLINK_PACKAGES and BUILDLINK_ORDER is handled by a single new
variable BUILDLINK_TREE. Each buildlink3.mk file adds a pair of
enter/exit marker, which can be used to reconstruct the tree and
to determine first level includes. Avoiding := for large variables
(BUILDLINK_ORDER) speeds up parse time as += has linear complexity.
The include guard reduces system time by avoiding reading files over and
over again. For complex packages this reduces both %user and %sys time to
half of the former time.

Log message:
PKGREVISION bump for libsndfile ABI depends bump.

Log message:
Add DESTDIR support.

Approved by <tnn>.

Log message:
Add REPLACE_OCTAVE feature.

Log message:
Changes 3.0.3:
* Bug fixes
* Improvements

Log message:
Changes 3.0.2:
* Bug-fix release.

Log message:
Use the PIC flag for Fortran that autoconf picks out. Fixes broken
build on amd64 and probably others.

Log message:
Changes 3.0.1:
* This is a bug-fixing release.

Log message:
Changes 3.0.0:
* Compatibility with Matlab graphics is much better now.  We now
  have some graphics features that work like Matlab's Handle
  Graphics (tm):
* The way Octave handles search paths has changed.
* Previous versions of Octave had a number of built-in variables to
  control warnings (for example, warn_divide_by_zero).  These
  variables have been replaced by warning identifiers that are used
  with the warning function to control the state of warnings.
* All built-in variables have been converted to functions.
* For compatibility with Matlab, the output order of Octave's
  "system" function has changed.
* For compatibility with Matlab, the output of Octave's fsolve
  function has been changed.
* For compatibility with Matlab, normcdf, norminv, normpdf, and
  normrnd have been modified to compute distributions using the
  standard deviation instead of the variance.
* For compatibility with Matlab, gamcdf, gaminv, gampdf, gamrnd,
  expcdf, expinv, exppdf and exprnd have been modified to compute
  the distributions using the standard scale factor rather than
  one over the scale factor.

Log message:
Removed ftp.eos.hokudai.ac.jp from MASTER_SITES, doesn't resolve anymore
in DNS. Mentioned by Zafer Aydogan in PR pkg/37318.