Update and canonicalize a bunch of script descriptions

scripts/amqp-info.nse

@@ -1,6 +1,5 @@
 description = [[
-Gathers information from an AMQP server.
+Gathers information (a list of all server properties) from an AMQP (advanced message queuing protocol) server.
-It lists all of its server properties.
 
 See http://www.rabbitmq.com/extensions.html for details on the
 <code>server-properties</code> field.

scripts/dns-zeustracker.nse

@@ -1,5 +1,5 @@
 description = [[
-Check if your IP-range is part of a Zeus botnet by quering ZTDNS @ abuse.ch!
+Checks if the target IP range is part of a Zeus botnet by quering ZTDNS @ abuse.ch.
 Please review the following information before you start to scan:
 * https://zeustracker.abuse.ch/ztdns.php
 ]]

scripts/ganglia-info.nse

@@ -1,6 +1,6 @@
 description = [[
-Retrieves system information from a listening Ganglia Monitoring Daemon or
+Retrieves system information (OS version, available memory, etc.) from
-Ganglia Meta Daemon.
+a listening Ganglia Monitoring Daemon or Ganglia Meta Daemon.
 
 Ganglia is a scalable distributed monitoring system for high-performance
 computing systems such as clusters and Grids. The information retrieved

scripts/http-cors.nse

@@ -1,10 +1,11 @@
 description = [[
-Tests an http server for Cross-Origin Resource Sharing.
+Tests an http server for Cross-Origin Resource Sharing (CORS), a way
+for domains to explicitly opt in to having certain methods invoked by
+another domain.
 
-Cross-Origin Resource Sharing is a way for domains to explicitly opt in
+The script works by setting the Access-Control-Request-Method header
-to having certain methods invoked by another domain. The script works by
+field for certain enumerated methods in OPTIONS requests, and checking
-setting the Access-Control-Request-Method header field for certain
+the responses.
-enumerated methods in OPTIONS requests, and checking the responses.
 ]]
 
 ---

scripts/http-robtex-reverse-ip.nse

@@ -1,7 +1,5 @@
 description = [[
-This script is inspired from http-reverse-ip to do a reverse ip lookup 
+Obtains up to 100 forward DNS names for a target IP address by querying http://www.robtex.com/ip/.
-using robtex website by parsing http://www.robtex.com/ip/ and return 
-maximum of 100 domains
 ]]
 
 ---

scripts/ipv6-node-info.nse

@@ -1,5 +1,5 @@
 description = [[
-Gets hostnames, IPv4 and IPv6 addresses through IPv6 Node Information Queries.
+Obtains hostnames, IPv4 and IPv6 addresses through IPv6 Node Information Queries.
 
 IPv6 Node Information Queries are defined in RFC 4620. There are three
 useful types of queries:

scripts/irc-brute.nse

@@ -1,5 +1,5 @@
 description=[[
-Performs password guessing agains the IRC service
+Performs brute force password auditing against IRC (Internet Relay Chat) servers.
 ]]
 
 ---

scripts/krb5-enum-users.nse

@@ -1,5 +1,5 @@
 description = [[
-Discovers valid usernames by querying the Kerberos service for a TGT.
+Discovers valid usernames by brute force querying likely usernames against a Kerberos service.
 When an invalid username is requested the server will responde using the
 Kerberos error code KRB5KDC_ERR_C_PRINCIPAL_UNKNOWN, allowing us to determine
 that the user name was invalid. Valid user names will illicit either the

scripts/ms-sql-dump-hashes.nse

@@ -1,7 +1,7 @@
 description = [[
-Dumps the password hashes from MS-SQL server in a format suitable for
+Dumps the password hashes from an MS-SQL server in a format suitable for
-John-the-ripper. In order to do so the user needs to have the appropriate
+cracking by tools such as John-the-ripper. In order to do so the user
-privileges. 
+needs to have the appropriate privileges.
 
 Credentials passed as script arguments take precedence over credentials
 discovered by other scripts.

scripts/nessus-brute.nse

@@ -1,5 +1,5 @@
 description=[[
-Performs password guessing against the Nessus service using the NTP 1.2 protocol.
+Performs brute force password auditing against a Nessus vulnerability scanning daemon using the NTP 1.2 protocol.
 ]]
 
 ---

scripts/openlookup-info.nse

@@ -1,7 +1,5 @@
 description = [[
-Displays the banner information of an OpenLookup server.
+Displays the banner information of an OpenLookup (network key-value store) server.
-
-OpenLookup is a network-accessible key-value store.
 ]]
 
 ---

scripts/rtsp-methods.nse

@@ -1,5 +1,5 @@
 description = [[
-Finds out what methods are supported by the RTSP server.
+Determines which methods are supported by the RTSP (real time streaming protocol) server.
 ]]
 
 ---

scripts/rtsp-url-brute.nse

@@ -1,6 +1,5 @@
 description = [[
-Attempts to brute common RTSP media URLs for devices such as surveillance IP
+Attempts to enumerate RTSP media URLS by testing for common paths on devices such as surveillance IP cameras.
-cameras.
 ]]
 
 ---

scripts/tftp-enum.nse

@@ -1,5 +1,6 @@
 description = [[
-Checks for TFTP filenames from a list.
+Enumerates TFTP (trivial file transfer protocol) filenames by testing
+for a list of common ones.
 
 TFTP doesn't provide directory listings. This script tries to retrieve
 filenames from a list. The list is composed of static names from the