docs: Update Transifex links

Author: marcuswin

README.md

@@ -66,7 +66,7 @@ Translations
 ------------
 
 Changes to translations as well as new translations can be submitted to
-[Bitcoin Core's Transifex page](https://www.transifex.com/projects/p/bitcoin/).
+[Bitcoin Core's Transifex page](https://www.transifex.com/bitcoin/bitcoin/).
 
 Translations are periodically pulled from Transifex and merged into the git repository. See the
 [translation process](doc/translation_process.md) for details on how this works.

doc/developer-notes.md

@@ -144,7 +144,7 @@ For example, to describe a function use:
  */
 bool function(int arg1, const char *arg2)
 ```
-A complete list of `@xxx` commands can be found at http://www.stack.nl/~dimitri/doxygen/manual/commands.html.
+A complete list of `@xxx` commands can be found at http://www.doxygen.nl/manual/commands.html.
 As Doxygen recognizes the comments by the delimiters (`/**` and `*/` in this case), you don't
 *need* to provide any commands for a comment to be valid; just a description text is fine.
 
@@ -185,7 +185,7 @@ Not OK (used plenty in the current source, but not picked up):
 //
 ```
 
-A full list of comment syntaxes picked up by Doxygen can be found at https://www.stack.nl/~dimitri/doxygen/manual/docblocks.html,
+A full list of comment syntaxes picked up by Doxygen can be found at http://www.doxygen.nl/manual/docblocks.html,
 but the above styles are favored.
 
 Documentation can be generated with `make docs` and cleaned up with `make clean-docs`. The resulting files are located in `doc/doxygen/html`; open `index.html` to view the homepage.

doc/release-notes.md

@@ -380,4 +380,4 @@ Credits
 Thanks to everyone who directly contributed to this release:
 
 
-As well as everyone that helped translating on [Transifex](https://www.transifex.com/projects/p/bitcoin/).
+As well as everyone that helped translating on [Transifex](https://www.transifex.com/bitcoin/bitcoin/).

doc/translation_process.md

@@ -8,7 +8,7 @@ Transifex is setup to monitor the GitHub repo for updates, and when code contain
 
 Multiple language support is critical in assisting Bitcoin’s global adoption, and growth. One of Bitcoin’s greatest strengths is cross-border money transfers, any help making that easier is greatly appreciated.
 
-See the [Transifex Bitcoin project](https://www.transifex.com/projects/p/bitcoin/) to assist in translations. You should also join the translation mailing list for announcements - see details below.
+See the [Transifex Bitcoin project](https://www.transifex.com/bitcoin/bitcoin/) to assist in translations. You should also join the translation mailing list for announcements - see details below.
 
 ### Writing code with translations
 We use automated scripts to help extract translations in both Qt, and non-Qt source files. It is rarely necessary to manually edit the files in `src/qt/locale/`. The translation source files must adhere to the following format:
@@ -43,7 +43,7 @@ git commit
 ### Creating a Transifex account
 Visit the [Transifex Signup](https://www.transifex.com/signup/) page to create an account. Take note of your username and password, as they will be required to configure the command-line tool.
 
-You can find the Bitcoin translation project at [https://www.transifex.com/projects/p/bitcoin/](https://www.transifex.com/projects/p/bitcoin/).
+You can find the Bitcoin translation project at [https://www.transifex.com/bitcoin/bitcoin/](https://www.transifex.com/bitcoin/bitcoin/).
 
 ### Installing the Transifex client command-line tool
 The client is used to fetch updated translations. If you are having problems, or need more details, see [https://docs.transifex.com/client/installing-the-client](https://docs.transifex.com/client/installing-the-client)