Log Message:
Updated confuse to 3.0.

[v3.0][] - 2016-03-03
---------------------

This release signifies a major change in libConfuse.  On out-of-memory
conditions at run time, invalid API input, and some other odd use-cases,
libConfuse will no longer `assert()`.  Instead, `NULL` or `CFG_FAIL` is
returned with an error code for you to handle.  For some users this will
completely change how your application works, so heads up!  The library
ABI version has also been stepped due to this.

Special thanks in this release goes out to Frank Hunleth, Peter Rosin
and David Grayson for their tireless efforts in helping improve this
library!

**Note:** libConfuse no longer calls `setlocale()` for `LC_MESSAGES` and
  `LC_CTYPE`.  See the documentation for `cfg_init()` for details.

### Changes

* Support for handling unknown options.  The idea is to provide future
  proofing of configuration files, i.e. if a new parameter is added, the
  new config file will not fail if loaded in an older version of your
  program.  See the `CFGF_IGNORE_UNKNOWN` flag in the documenation for
  more information.  Idea and implementation by Frank Hunleth.
* Add public API for removing sections at runtime, by Peter Rosin.
* Allow `cfg_opt_getval()` on options that are `CFGF_MULTI` sections,
  by Peter Rosin.
* Add `cfg_setmulti()` and `cfg_opt_setmulti()`, by Peter Rosin.
* Add CLI example of how to manage configuration changes at runtime,
  also by Peter Rosin.
* Support for Travis-CI and Coverity Scan, by Joachim Nilsson.
* Use `autoreconf` in `autogen.sh` instead of calling tools separately.
* Powershell script for AppVeyor CI to build libConfuse with MSYS2
  by David Grayson.
* Removed calls to `setlocale()` intended to localize messages, with
  `LC_MESSAGES`, and region specific types, with `LC_CTYPE`.  This is
  now the responsibility of the user of the library.
* Reindent to Linux coding style for a clear and well defined look,
  this to ease future maintenance.  Issue #33
* Add support for `CFGF_DEPRECATED` and `CFGF_DROP` option flags.  The
  former causes libConfuse to print a deprecated warning message and the
  latter drops the read value on input.  Idea and implementation by
  Sebastian Geiger.  Issue #24
* Add `HACKING.md` document to detail maintenance and release checklists

### Fixes

* Do not assert on API input validation, memory allocation, or similar.
  Instead, return error code to user for further handling.  This change
  also includes fixes for a lot of unchecked API return values, e.g.,
  `strdup()`.  Issue #37
* Protect callers arguments to `cfg_setopt()`, by Peter Rosin
* If new value to `cfg_setopt()` fails parsing, do not lose old value,
  by Peter Rosin.
* Fixes to update support for older versions of Microsoft Visual Studio
  as well as MSYS2/mingw-w64 by Peter Rosin and David Grayson.
* Issue #45: `cfg_init()` does not report error on multiple options with
  the same name.  Fixed by Peter Rosin.
* Fixes for memory leaks, invalid expressions, unused variables and
  missing error handling, all thanks to Coverity Scan