Drop support for UNC path parsing in normalize_win_path

Not really a good idea to try to parse UNC format. Confuses the
purpose of the function.

Author: wchen-r7

lib/rex/file.rb

@@ -40,9 +40,7 @@ def self.normalize_win_path(*strs)
 
 		# Parse the path prefix
 		prefix = (s[0] || '').gsub(/[\*<>\?\/]/, '')
-		if prefix.empty?
-			prefix = '\\'
-		elsif prefix =~ /^\w:$/ and s.length == 1
+		if prefix =~ /^\w:$/ and s.length == 1
 			prefix += '\\'
 		end
 

spec/lib/rex/file_utils_spec.rb

@@ -12,6 +12,11 @@
 				described_class.normalize_win_path('C:\\hello\\world').should eq("C:\\hello\\world")
 			end
 
+			it "should convert a relative path" do
+				described_class.normalize_win_path('/', 'test', 'me').should eq("\\test\\me")
+				described_class.normalize_win_path('\\temp').should eq("\\temp")
+			end
+
 			it "should convert a path without reserved characters" do
 				described_class.normalize_win_path('C:\\', 'Windows:').should eq("C:\\Windows")
 				described_class.normalize_win_path('C:\\Windows???\\test').should eq("C:\\Windows\\test")
@@ -22,16 +27,6 @@
 				described_class.normalize_win_path('C:\\\\\\Hello World\\\\whatever.txt').should eq("C:\\Hello World\\whatever.txt")
 				described_class.normalize_win_path('C:\\\\').should eq("C:\\")
 			end
-
-			it "should parse UNC path format as an array or a string" do
-				described_class.normalize_win_path('\\\\127.0.0.1', 'C$').should eq("\\\\127.0.0.1\\C$")
-				described_class.normalize_win_path('\\\\127.0.0.1\\C$').should eq("\\\\127.0.0.1\\C$")
-			end
-
-			it "should parse a relative path in Windows format" do
-				described_class.normalize_win_path('\\\\127.0.0.1', 'C$').should eq("\\\\127.0.0.1\\C$")
-				described_class.normalize_win_path('\\\\127.0.0.1\\C$').should eq("\\\\127.0.0.1\\C$")
-			end
 		end
 
 		context ".normalize_unix_path" do