Log Message:
yelp-tools: update to 42.1.

42.1
====
* Fixed issue with DocBook when path is missing trailing slash, #22

42.0
====
* No changes since beta, stable release only

42.beta
=======
* yelp.m4: Avoid argument list too long error when cleaning (Dan Nicholson)

41.0
====
* No changes since beta, stable release only

41.beta
=======
* Updates documentation (Andre Klapper)
* Updates to build files (Jan Tojnar)

40.0
====
* Stable release. No updates since 40.rc.

40.rc
=====
* Removed comment about revision version attrs from templates
* Use /usr/bin/python3 as shebang

40.beta
=======
* Added --skip option to skip files in yelp-check
* Custom checkers in yelp-check return 1 on failure

40.alpha
========
* First release using the meson build system
* Converted yelp-build, yelp-check, and yelp-new to python
* New and improved templates for yelp-new
* Support for .yelp-tools.cfg config file
* Config file can specify custom checkers, like Schematron but easier
* yelp-check hrefs takes a configurable allow list

3.38.0
======
* Stable release. No changes since 3.37.90

3.37.90
=======
* yelp-new: Added new templates