Cause: process's additional environment variables are not expanded
by correctly.

Innovated by studentmain (StudentEx <scncgz@gmail.com>)

Add OpenSSL 1.1.0g support due to hardware acceleration

Note: If you want to compile it by yourself, please make sure
do NOT use `no-asm` configure option, since the main point of
this commit is to utilize assembly in openssl

Add OpenSSL test

SIP003 server port validation
Year 2018

When saving user-rule.txt file, some text editors can raise FileSystemWatcher event twice.
The 1st time is blank content, then the 2nd time is the modified content.

Put user rules at the begin of the PAC file.

This might fix 500 Privoxy Internal Error: no-server-data

Fix: #1468
Enhance: 46d40fec67

Signed-off-by: Syrone Wong <wong.syrone@gmail.com>

Signed-off-by: Syrone Wong <wong.syrone@gmail.com>

Signed-off-by: Syrone Wong <wong.syrone@gmail.com>

- change dir name to "ss_win_temp" to make things clear.
- throw any exception caught when creating temp folder

To workaround silly cleaning softwares and careless users.

Signed-off-by: Syrone Wong <wong.syrone@gmail.com>

* Send socks5 handshake respond before read the target address
So that the next package will (hopefully) contain the first data chunk which means we could get a 'random' first package size.

* Try read available data before send first packet

* Add random size first packet
But commented out ^u^

* Oops forget to delete some test code

Signed-off-by: Syrone Wong <wong.syrone@gmail.com>

Signed-off-by: Syrone Wong <wong.syrone@gmail.com>

- naming private vars
- object initializer

Signed-off-by: Syrone Wong <wong.syrone@gmail.com>

And farewell.

This reverts commit be3cc3f3a6.

This reverts commit 0d4d01af3b.

This reverts commit 5ba0dffa5d.

This reverts commit f9e39fdd1d.

This reverts commit d1e8f38767.

This reverts commit f2b8e91f81.

This reverts commit b04c59d8e6.

This reverts commit 9cdb71875a.

This reverts commit 566a0fcfa5.

Check null ref (#940)