Encourage +1's for prioritisation

Adds a small text to each issue and the PR template to encourage people to use
:+1:'s for issues they're also interested in. See
https://github.com/NixOS/nix.dev/issues/359 for more information

Co-Authored-By: Valentin Gagarin <valentin.gagarin@tweag.io>

+7
.github/ISSUE_TEMPLATE/bug_report.md
···
[user@system:~]$ nix-shell -p nix-info --run "nix-info -m"
output here
```
···
[user@system:~]$ nix-shell -p nix-info --run "nix-info -m"
output here
```
+
+
### Priorities
+
+
Add a :+1: [reaction] to [issues you find important].
+
+
[reaction]: https://github.blog/2016-03-10-add-reactions-to-pull-requests-issues-and-comments/
+
[issues you find important]: https://github.com/NixOS/nixpkgs/issues?q=is%3Aissue+is%3Aopen+sort%3Areactions-%2B1-desc
+7
.github/ISSUE_TEMPLATE/build_failure.md
···
[user@system:~]$ nix-shell -p nix-info --run "nix-info -m"
output here
```
···
[user@system:~]$ nix-shell -p nix-info --run "nix-info -m"
output here
```
+
+
### Priorities
+
+
Add a :+1: [reaction] to [issues you find important].
+
+
[reaction]: https://github.blog/2016-03-10-add-reactions-to-pull-requests-issues-and-comments/
+
[issues you find important]: https://github.com/NixOS/nixpkgs/issues?q=is%3Aissue+is%3Aopen+sort%3Areactions-%2B1-desc
+6
.github/ISSUE_TEMPLATE/missing_documentation.md
···
[open documentation issues]: https://github.com/NixOS/nixpkgs/issues?q=is%3Aissue+is%3Aopen+label%3A%229.needs%3A+documentation%22
[open documentation pull requests]: https://github.com/NixOS/nixpkgs/pulls?q=is%3Aopen+is%3Apr+label%3A%228.has%3A+documentation%22%2C%226.topic%3A+documentation%22
···
[open documentation issues]: https://github.com/NixOS/nixpkgs/issues?q=is%3Aissue+is%3Aopen+label%3A%229.needs%3A+documentation%22
[open documentation pull requests]: https://github.com/NixOS/nixpkgs/pulls?q=is%3Aopen+is%3Apr+label%3A%228.has%3A+documentation%22%2C%226.topic%3A+documentation%22
+
### Priorities
+
+
Add a :+1: [reaction] to [issues you find important].
+
+
[reaction]: https://github.blog/2016-03-10-add-reactions-to-pull-requests-issues-and-comments/
+
[issues you find important]: https://github.com/NixOS/nixpkgs/issues?q=is%3Aissue+is%3Aopen+sort%3Areactions-%2B1-desc
+7
.github/ISSUE_TEMPLATE/out_of_date_package_report.md
···
-----
Note for maintainers: Please tag this issue in your PR.
···
-----
Note for maintainers: Please tag this issue in your PR.
+
+
**Priorities**
+
+
Add a :+1: [reaction] to [issues you find important].
+
+
[reaction]: https://github.blog/2016-03-10-add-reactions-to-pull-requests-issues-and-comments/
+
[issues you find important]: https://github.com/NixOS/nixpkgs/issues?q=is%3Aissue+is%3Aopen+sort%3Areactions-%2B1-desc
+7
.github/ISSUE_TEMPLATE/packaging_request.md
···
* source URL:
* license: mit, bsd, gpl2+ , ...
* platforms: unix, linux, darwin, ...
···
* source URL:
* license: mit, bsd, gpl2+ , ...
* platforms: unix, linux, darwin, ...
+
+
**Priorities**
+
+
Add a :+1: [reaction] to [issues you find important].
+
+
[reaction]: https://github.blog/2016-03-10-add-reactions-to-pull-requests-issues-and-comments/
+
[issues you find important]: https://github.com/NixOS/nixpkgs/issues?q=is%3Aissue+is%3Aopen+sort%3Areactions-%2B1-desc
+7
.github/ISSUE_TEMPLATE/unreproducible_package.md
···
(please share the relevant fragment of the diffoscope output here, and any
additional analysis you may have done)
···
(please share the relevant fragment of the diffoscope output here, and any
additional analysis you may have done)
+
+
### Priorities
+
+
Add a :+1: [reaction] to [issues you find important].
+
+
[reaction]: https://github.blog/2016-03-10-add-reactions-to-pull-requests-issues-and-comments/
+
[issues you find important]: https://github.com/NixOS/nixpkgs/issues?q=is%3Aissue+is%3Aopen+sort%3Areactions-%2B1-desc
+7
.github/PULL_REQUEST_TEMPLATE.md
···
List of open PRs: https://github.com/NixOS/nixpkgs/pulls
Reviewing guidelines: https://nixos.org/manual/nixpkgs/unstable/#chap-reviewing-contributions
-->
···
List of open PRs: https://github.com/NixOS/nixpkgs/pulls
Reviewing guidelines: https://nixos.org/manual/nixpkgs/unstable/#chap-reviewing-contributions
-->
+
+
### Priorities
+
+
Add a :+1: [reaction] to [pull requests you find important].
+
+
[reaction]: https://github.blog/2016-03-10-add-reactions-to-pull-requests-issues-and-comments/
+
[pull requests you find important]: https://github.com/NixOS/nixpkgs/pulls?q=is%3Aopen+sort%3Areactions-%2B1-desc