Small typo fixes from spell checking.

docs/nmap-install.xml

@@ -154,7 +154,7 @@ sub 2048g/A50A6A94 2005-04-24
 <para>For every Nmap package download file
 (e.g. <filename>nmap-4.76.tar.bz2</filename> and
 <filename>nmap-4.76-win32.zip</filename>), there is a corresponding
-file in the sigs directory with <literal>.gpg.txt</literal> appended
+file in the <filename>sigs</filename> directory with <literal>.gpg.txt</literal> appended
 to the name (e.g. <filename>nmap-4.76.tar.bz2.gpg.txt</filename>).
 This is the detached signature file.</para>
 
@@ -191,7 +191,7 @@ and replaces both the distribution file and digest file, could defeat
 this test.  However, it can be useful to check the authoritative
 Nmap.Org hashes if you obtain Nmap from a third party or feel it
 might have been accidentally corrupted.  For every Nmap package download
-file, there is a corresponding file in the sigs directory with
+file, there is a corresponding file in the <filename>sigs</filename> directory with
 <literal>.digest.txt</literal> appended to the name
 (e.g. <filename>nmap-4.76.tar.bz2.digest.txt</filename>).  An example
 is shown in <xref linkend="ex-digest-file" xrefstyle="select: label nopage" />.  This is the detached
@@ -710,7 +710,7 @@ the number of ephemeral ports reserved for user applications (such as
 Nmap) and reduce the time delay before a closed connection can
 be reused.  Most people simply check the box to apply these changes in the executable Nmap installer, but you can also apply them by double-clicking on
 <filename>nmap_performance.reg</filename>, or by running the command
-<command>regedt32 nmap_performance.reg</command>.  To make the changes by hand, add these three Registry DWORD values to
+<command>regedit32 nmap_performance.reg</command>.  To make the changes by hand, add these three Registry DWORD values to
 the <literal>CurrentControlSet\Services\Tcpip\Parameters</literal> entry under <literal>HKEY_LOCAL_MACHINE\SYSTEM</literal>:</para>
 
 <variablelist>

docs/refguide.xml

@@ -844,7 +844,7 @@ Traceroute works by sending packets with a low TTL (time-to-live) in an attempt
           especially if you choose authoritative servers for your
           target IP space.  This option can also improve stealth, as
           your requests can be bounced off just about any recursive
-          DNS server on the internet.</para>
+          DNS server on the Internet.</para>
 
           <para>This option also comes in handy when scanning private
           networks.  Sometimes only a few name servers provide
@@ -1562,7 +1562,7 @@ way.</para>
         </term>
         <listitem>
           <para>Specifies that you wish to scan fewer ports than the
-          default. Normally Nmaps scans the most common 1,000 ports for
+          default. Normally Nmap scans the most common 1,000 ports for
           each scanned protocol. With <option>-F</option>, this is
           reduced to 100.</para>
 
@@ -2077,7 +2077,7 @@ Nmap script database.</para>
         <indexterm><primary>script arguments</primary><seealso><option>--script-args</option></seealso></indexterm></term>
 
 <listitem>
-<para>lets you provide arguments to NSE scripts. Arguments are passed
+<para>Lets you provide arguments to NSE scripts. Arguments are passed
 as <literal>name=value</literal> pairs. The provided argument is
 processed and stored inside a Lua table, to which all scripts have
 access. The names are taken as strings (which must be alphanumeric

docs/scripting.xml

@@ -1716,7 +1716,7 @@ local localip, localport = try(client_service:get_info())
     information useful to a developer using a module or a user running a
     script.
     <xref linkend="nse-documentation-module" xrefstyle="select: label nopage"/>
-    shows documenatation for the <literal>comm</literal> module (with a
+    shows documentation for the <literal>comm</literal> module (with a
     few paragraphs removed to save space).
     </para>