Hotfix against the web server misconfiguration

xmpp.v2.css isn’t served from the xeps docker, making all XEPs
render without CSS.

Makefile

@@ -8,7 +8,7 @@ TEXMLDEPS=xep2texml.xsl $(OUTDIR)/xmpp.pdf $(OUTDIR)/xmpp-text.pdf
 XEPDIRS=. inbox
 HTMLDEPS=xep.xsl $(CSSTARGETS) $(JSTARGETS)
 
-base_CSSTARGETS=xmpp.css xmpp.v2.css prettify.css
+base_CSSTARGETS=xmpp.css prettify.css
 CSSTARGETS=$(addprefix $(OUTDIR)/,$(base_CSSTARGETS))
 proto_CSSTARGETS=$(addprefix $(OUTDIR)/inbox/,$(base_CSSTARGETS))
 base_JSTARGETS=prettify.js

xep.xsl

@@ -180,7 +180,7 @@ display: none;
 content: "XEP-<xsl:value-of select='/xep/header/number'/>";
 }
         </style>
-        <link rel='stylesheet' type='text/css' href='xmpp.v2.css' />
+        <link rel='stylesheet' type='text/css' href='xmpp.css' />
         <link href="prettify.css" type="text/css" rel="stylesheet" />
         <link rel='shortcut icon' type='image/x-icon' href='/favicon.ico' />
         <script type="text/javascript" src="prettify.js">