Add defaults to the print_* method arguments

Fixes breakage with modules that use print_line() or similar.

This commit also includes some RDoc additions and markup fixes

lib/msf/core/exploit/http/server.rb

@@ -61,43 +61,43 @@ module Exploit::Remote::HttpServer
 
 	# :category: print_* overrides
 	# Prepends client and module name if inside a thread with a #cli
-	def print_line(msg)
+	def print_line(msg='')
 		(cli) ? super("#{cli.peerhost.ljust(16)} #{self.shortname} - #{msg}") : super
 	end
 	# :category: print_* overrides
 	# Prepends client and module name if inside a thread with a #cli
-	def print_status(msg)
+	def print_status(msg='')
 		(cli) ? super("#{cli.peerhost.ljust(16)} #{self.shortname} - #{msg}") : super
 	end
 	# :category: print_* overrides
 	# Prepends client and module name if inside a thread with a #cli
-	def print_error(msg)
+	def print_error(msg='')
 		(cli) ? super("#{cli.peerhost.ljust(16)} #{self.shortname} - #{msg}") : super
 	end
 	# :category: print_* overrides
 	# Prepends client and module name if inside a thread with a #cli
-	def print_debug(msg)
+	def print_debug(msg='')
 		(cli) ? super("#{cli.peerhost.ljust(16)} #{self.shortname} - #{msg}") : super
 	end
 
 	# :category: print_* overrides
 	# Prepends client and module name if inside a thread with a #cli
-	def vprint_line(msg)
+	def vprint_line(msg='')
 		(cli) ? super("#{cli.peerhost.ljust(16)} #{self.shortname} - #{msg}") : super
 	end
 	# :category: print_* overrides
 	# Prepends client and module name if inside a thread with a #cli
-	def vprint_status(msg)
+	def vprint_status(msg='')
 		(cli) ? super("#{cli.peerhost.ljust(16)} #{self.shortname} - #{msg}") : super
 	end
 	# :category: print_* overrides
 	# Prepends client and module name if inside a thread with a #cli
-	def vprint_error(msg)
+	def vprint_error(msg='')
 		(cli) ? super("#{cli.peerhost.ljust(16)} #{self.shortname} - #{msg}") : super
 	end
 	# :category: print_* overrides
 	# Prepends client and module name if inside a thread with a #cli
-	def vprint_debug(msg)
+	def vprint_debug(msg='')
 		(cli) ? super("#{cli.peerhost.ljust(16)} #{self.shortname} - #{msg}") : super
 	end
 
@@ -123,6 +123,8 @@ module Exploit::Remote::HttpServer
 		use_zlib
 	end
 
+	##
+	# :category: Exploit::Remote::TcpServer overrides
 	#
 	# This mixin starts the HTTP server listener.  This routine takes a few
 	# different hash parameters:
@@ -187,6 +189,21 @@ module Exploit::Remote::HttpServer
 		add_resource(uopts)
 	end
 
+	#
+	# Return a Hash containing a best guess at the actual browser and operating
+	# system versions, based on the User-Agent header.
+	#
+	# Keys in the returned hash are similar to those expected of
+	# Report#report_client, and Report#report_host namely:
+	# +:ua_name+::     a brief identifier for the client, e.g. "Firefox"
+	# +:ua_ver+::      the version number of the client, e.g. "3.0.11"
+	# +:os_name+::     one of the Msf::OperatingSystems constants
+	# +:os_flavor+::   something like "XP" or "Gentoo"
+	# +:os_lang+::     something like "English", "French", or "en-US"
+	# +:arch+::        one of the ARCH_* constants
+	#
+	# Unknown values may be nil.
+	#
 	def fingerprint_user_agent(ua_str)
 		fp = { :ua_string => ua_str }
 
@@ -323,6 +340,9 @@ module Exploit::Remote::HttpServer
 	#   Proc     => The procedure to call when the URI is requested.
 	#   LongCall => Indicates that the request is a long call.
 	#
+	# NOTE: Calling #add_resource will change the results of subsequent calls
+	# to #get_resource!
+	#
 	def add_resource(opts)
 		@service_path = opts['Path']
 		service.add_resource(opts['Path'], opts)
@@ -380,10 +400,9 @@ module Exploit::Remote::HttpServer
 	# All of this will be for naught in the case of a user behind NAT using a
 	# bind payload but there's nothing we can do about it.
 	#
-	# NOTE: The address will be incorrect when
-	#   a) LHOST is pointed at a multi/handler on some other box.
-	# or
-	#   b) SRVHOST has a value of '0.0.0.0', the user is behind NAT, and we're
+	# NOTE: The address will be *incorrect* in the following two situations:
+	# 1) LHOST is pointed at a multi/handler on some other box.
+	# 2) SRVHOST has a value of '0.0.0.0', the user is behind NAT, and we're
 	#    using a bind payload.  In that case, we don't have an LHOST and
 	#    the source address will be internal.
 	#
@@ -876,15 +895,17 @@ module Exploit::Remote::HttpServer::PHPInclude
 		true
 	end
 
+	##
+	# :category: Exploit::Remote::TcpServer overrides
 	#
 	# Override exploit() to handle service start/stop
 	#
 	# Disables SSL for the service since we always want to serve our evil PHP
 	# files from a non-ssl server.  There are two reasons for this:
-	# a) https is only supported on PHP versions after 4.3.0 and only if
+	# 1. https is only supported on PHP versions after 4.3.0 and only if
 	#    the OpenSSL extension is compiled in, a non-default configuration on
 	#    most systems
-	# b) somewhat less importantly, the SSL option would conflict with the
+	# 2. somewhat less importantly, the SSL option would conflict with the
 	#    option for our client connecting to the vulnerable server
 	#
 	def exploit
@@ -926,6 +947,8 @@ module Exploit::Remote::HttpServer::PHPInclude
 		send_response(cli, body, headers)
 	end
 
+	##
+	# :category: Event Handlers
 	#
 	# Handle an incoming PHP code request
 	#