Pull Request Template/README.md: clarify ⚠ symbol meaning, clarify formatting guidelines

Fixes https://github.com/awesome-selfhosted/awesome-selfhosted/issues/2207

.github/PULL_REQUEST_TEMPLATE.md

@@ -2,27 +2,23 @@ Thank you for taking the time to work on a PR for Awesome-Selfhosted!
 
 To ensure your PR is dealt with swiftly please check the following:
 
-- [ ] Your submissions are formatted according to the following requirements:
-        
+- [ ] Your submissions are formatted according to the following requirements (`Demo` and `Clients` are optional, don't add a duplicate `Source code` link if it is the same as the main link):
+
 ``- [Name](http://homepage/) - Short description, less than 250 characters. ([Demo](http://url.to/demo), [Source Code](http://url.of/source/code), [Clients](https://url.to/list/of/related/clients-or-apps)) `License` `Language` ``
 
-Depends on proprietary services:
+- [ ] If your additions depend on proprietary services outside the user's control, they must be marked `⚠`.
 
 ``- [Name](http://homepage/) `⚠` - Short description, less than 250 characters. ([Demo](http://url.to/demo), [Source Code](http://url.of/source/code), [Clients](https://url.to/list/of/related/clients-or-apps)) `License` `Language` ``
 
-Non-free software in `non-free.md`:
+- [ ] Additions that are not [Free software](https://en.wikipedia.org/wiki/Free_software) must be added to `non-free.md` and marked `⊘ Proprietary`:
 
 ``- [Name](http://homepage/) `⊘ Proprietary` - Short description, less than 250 characters. ([Demo](http://url.to/demo), [Source Code](http://url.of/source/code), [Clients](https://url.to/list/of/related/clients-or-apps)) `Language` ``
 
-
 - [ ] Your additions are ordered alphabetically.
-- [ ] Your additions are [Free software](https://en.wikipedia.org/wiki/Free_software), or if not they have been added to [non-free](non-free.md) and marked `⊘ Proprietary`.
-- [ ] If your additions depend on proprietary services outside the user's control, they must be marked `⚠`.
 - [ ] Your additions are not already listed at [awesome-sysadmin](https://github.com/n1trux/awesome-sysadmin) (IT infrastructure management), [staticgen.com](https://www.staticgen.com/) or [staticsitegenerators.net](https://staticsitegenerators.net/) (static site generators).
-- [ ] Your additions have their `License` and main server-side `Language`/platform/requirement listed.
+- [ ] The `Language` tag is the main server-side requirement for the software - don't include frameworks/specifc dialects.
 - [ ] Any licenses you have added are in our [list of licenses](https://github.com/awesome-selfhosted/awesome-selfhosted/blob/master/README.md#list-of-licenses).
 - [ ] You have searched the repository for any relevant [issues](https://github.com/awesome-selfhosted/awesome-selfhosted/issues) or [PRs](https://github.com/awesome-selfhosted/awesome-selfhosted/pulls), including closed ones.
-- [ ] If the main link of your addition points to the program's source code, there is no need to add a duplicate _Source Code_ link. The _Demo_ and _Clients_ links are not mandatory.
 - [ ] Any category you are creating has the minimum requirement of 3 items. If not, your addition may be inserted into `Misc/Other`.
 - [ ] Any software project you are adding to the list is actively maintained.
 - [ ] The pull request title is "Add aaa to bbb" for adding software aaa to section bbb. Do not call it "Update README.md".

README.md

@@ -1592,7 +1592,7 @@ See also [Documentation Generators](#documentation-generators), [Wikimatrix](htt
 
 **[`^        back to top        ^`](#)**
 
-- `⚠ ` - Depends on a third party network service
+- `⚠ ` - Depends on a proprietary service outside the user's control
 - `0BSD` - [BSD Zero-Clause Licence](https://opensource.org/licenses/0BSD)
 - `AAL` - [Attribution Assurance License](https://opensource.org/licenses/AAL)
 - `AGPL-3.0` - [GNU Affero General Public License 3.0](https://www.gnu.org/licenses/agpl-3.0)