[Bug 4995] Check for fontforge >= 20060406 as earlier versions fail to build our fonts with catastrophic results.

[Mike McCormack]

Sam Dennis wrote:

> +if PKG_CHECK_MINVER(fontforge, 20060406); then

configure should check for features, not versions.  This avoids problems 
with patched older versions or newer versions with features removed.

To check for fontforge correctly, we need to check that it will generate 
a ttf file that works with Wine.

The alternative is to fix up the sfd2ttf that somebody posted a month or 
two ago and use that so that we don't depend on fontforge.

Mike