Description of problem:

aria2 is unable to fetch content from HTTPS sites. Downloads fail with an "SSL initialization failed: The request is invalid." error.



Version-Release number of selected component (if applicable):

Package version is `aria2-1.34.0-4.el7`.



How reproducible:

Always reproducible.



Steps to Reproduce:
1. Run `aria2c https://google.com/`



Actual results:

> [ansible@proclidev03 ~]$ aria2c https://google.com/
> 
> 04/29 16:35:58 [NOTICE] Downloading 1 item(s)
> 
> 04/29 16:35:58 [ERROR] CUID#7 - Download aborted. URI=https://google.com/
> Exception: [AbstractCommand.cc:351] errorCode=1 URI=https://google.com/
>   -> [SocketCore.cc:932] errorCode=1 SSL initialization failed: The request is invalid.
> 
> 04/29 16:35:58 [NOTICE] Download GID#5f7b61ae195c3275 not complete: 
> 
> Download Results:
> gid   |stat|avg speed  |path/URI
> ======+====+===========+=======================================================
> 5f7b61|ERR |       0B/s|https://google.com/
> 
> Status Legend:
> (ERR):error occurred.
> 
> aria2 will resume download if the transfer is restarted.
> If there are any errors, then see the log file. See '-l' option in help/man page for details.



Expected results:

[ansible@proclidev03 t]$ aria2c https://google.com
> 
> 04/29 16:11:26 [NOTICE] Downloading 1 item(s)
> 
> 04/29 16:11:26 [NOTICE] CUID#7 - Redirecting to https://www.google.com/
> 
> 04/29 16:11:26 [NOTICE] Download complete: /home/ansible/index.html
> 
> Download Results:
> gid   |stat|avg speed  |path/URI
> ======+====+===========+=======================================================
> 09e5ef|OK  |    28KiB/s|/home/ansible/index.html
> 
> Status Legend:
> (OK):download completed.



Additional info:

Reproduced on both RHEL 7 and CentOS 7.

Compiling the source RPM without passing `--enable-gnutls-system-crypto-policy` to `./configure` resolves this issue. It appears that GnuTLS does not support the "@SYSTEM" priority on these systems.