docs: unify "nm-property-infos-*.xml" and "nm-settings-docs-*.xml" (root element)

There is no need that two XML files that essentially hold similar
information are fundamentally different. Make them more alike.
This way, we can use the same tools that operate on either of
these input files.

libnm/generate-docs-nm-property-infos.pl

@@ -131,17 +131,13 @@ sub process_data {
 # - XML handling -
 sub write_header {
   (my $header =
-    qq{<?xml version=\"1.0\"?>
+    qq{<nm-setting-docs>
-       <!DOCTYPE nm-$plugin-docs [
-       ]>
-
-       <nm-$plugin-docs>
   }) =~ s/^ {7}//mg;
   print {$fo} $header;
 }
 
 sub write_footer {
-  my $footer = "</nm-$plugin-docs>";
+  my $footer = "</nm-setting-docs>";
   print {$fo} $footer;
 }
 

libnm/generate-docs-nm-settings-docs-merge.py

@@ -107,7 +107,7 @@ output_xml_file = sys.argv[1]
 
 xml_roots = list([ET.parse(f).getroot() for f in sys.argv[2:]])
 
-assert(all([root.tag.startswith('nm-') for root in xml_roots]))
+assert(all([root.tag == 'nm-setting-docs' for root in xml_roots]))
 
 settings_roots = list([node_to_dict(root, 'setting', 'name') for root in xml_roots])
 

man/nm-settings-ifcfg-rh.xsl

@@ -8,7 +8,7 @@
 
   <!-- We need to strip whitespaces so that position() function counts correctly.
        http://www.oxygenxml.com/archives/xsl-list/200305/msg00430.html -->
-  <xsl:strip-space elements="nm-ifcfg-rh-docs setting" />
+  <xsl:strip-space elements="nm-setting-docs setting" />
 
   <xsl:output
       method="xml"
@@ -16,7 +16,7 @@
       doctype-system="http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd"
       />
 
-  <xsl:template match="nm-ifcfg-rh-docs">
+  <xsl:template match="nm-setting-docs">
     <refentry id="nm-settings-ifcfg-rh">
       <refentryinfo>
         <title>nm-settings-ifcfg-rh</title>

man/nm-settings-keyfile.xsl

@@ -12,7 +12,7 @@
       doctype-system="http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd"
       />
 
-  <xsl:template match="nm-keyfile-docs">
+  <xsl:template match="nm-setting-docs">
     <refentry id="nm-settings-keyfile">
       <refentryinfo>
         <title>nm-settings-keyfile</title>