Fix for SSL_connect problem and range problems

v0.7.13

Fix problem with invalid range

Fix digest auth proxy connection

v0.7.12

Fix #731

Fixed SSL read timeout problem

v0.7.11

Fixed compiler error for old compiler.

Temporary fix for memory leak on SSL

Please see #706 to find more information.

set_mount_point accepts HTTP headers

Add `cache_control` parameter to `set_mount_point` (#688)

* Add `cache_control` parameter to `set_mount_point`

Specifies the Cache-Control header value to return when specified. For example:

```
svr.set_mount_point("/assets", "public/assets", "public, max-age=604800, immutable");
```

* Add default for cache_control

Default to "no-cache", which is implicitly what is happening today.

* Change set_mount_point to accept Headers

* Don't use C++17 destructuring

Fix for '100 Continue' problem on client

v0.7.8

Fix #661

Added CPPHTTPLIB_COMPRESSION_BUFSIZ

Add compression buffer size customization (#644)

* add compression buffer size customization and small brotli refactor

* allocat brotli buffer once

* add init to brotli decoder buffer

Fixed various bugs

v0.7.6

Fix server crash caused due to regex complexity while matching header…

Content provider without content length

v0.7.5

Update README

Brotli support on server

v0.7.4

Fixed example build errors