[MacPorts] #54219: neomutt: fails to create manual.html and manual.txt

[MacPorts]

#54219: neomutt: fails to create manual.html and manual.txt
-------------------------+---------------------
 Reporter:  richardp345  |      Owner:
     Type:  defect       |     Status:  new
 Priority:  Normal       |  Milestone:
Component:  ports        |    Version:  2.4.1
 Keywords:               |       Port:  neomutt
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 {{{
 xsltproc --nonet -o manual.html ./html.xsl manual.xml
 I/O error : Attempt to load network entity
 http://docbook.sourceforge.net/release/xsl/current/xhtml/docbook.xsl
 warning: failed to load external entity
 "http://docbook.sourceforge.net/release/xsl/current/xhtml/docbook.xsl"
 compilation error: file ./html.xsl line 3 element import
 xsl:import : unable to load
 http://docbook.sourceforge.net/release/xsl/current/xhtml/docbook.xsl
 make[3]: [manual.html] Error 5 (ignored)
 LC_ALL=C w3m -dump -O UTF8 manual.html > manual.txt || \
         LC_ALL=C lynx -dump -nolist -with_backspaces -display_charset=us-
 ascii manual.html > manual.txt || \
         LC_ALL=C elinks -dump -no-numbering -no-references manual.html |
 sed -e 's,\\001, ,g' > manual.txt
 /bin/sh: w3m: command not found
 /bin/sh: lynx: command not found
 ELinks: No such file or directory
 }}}

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Ticket URL: <https://trac.macports.org/ticket/54219>
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