git doc build failure on OS X 10.5.6 (Leopard) during docbook2x-texi phase

(Thanks Jay Soffian for the environment variables)

The commands ...

  $ export ASCIIDOC8=YesPlease
  $ export DOCBOOK_XSL_172=YesPlease
  $ make prefix=/usr/local all doc info

... terminate with these errors:

  /bin/sh: docbook2x-texi: command not found [ x 147 ]

... this warning:

  gitman.texi:4: warning: unrecognized encoding name `UTF-8'.

and a zero-length user-manual.texi in Documentation.

Upon investigation, I determined that ...

  $ which docbook2x-texi

... reports empty, but ...

  $ which docbook2texi

... reports /opt/local/bin/docbook2texi.

  $ docbook2texi --version
  /opt/local/bin/docbook2texi (part of docbook2X 0.8.8)
  $Revision: 1.12 $ $Date: 2006/04/14 17:29:04 $
  <URL:http://docbook2x.sourceforge.net/>

Is docbook2texi vs docbook2x-texi a mere dialect difference that can
be completely rectified with a symbolic link, or an indication that my
docbook2X is misbuilt?