suckless: added patching guide

wiki/suckless.md

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+# Suckless
+
+Suckless is a community that is best known for minimalist free software.
+Notable works include `dwm` and `dmenu`.
+
+## Workflow for installation
+
+Programs written by the suckless community are minimal by default.
+`.diff` files are available to patch functionality.
+Configuring is done in the `config.h` file.
+Expressions in `<>` may need replacement.
+
+- If not already created initialize a git repository
+- Create and switch to the `base` brach with `git branch base`
+- Download the default version of the suckless program you want to patch
+- Add and commit all the files in the `base` branch
+- Clean the master branch
+with `make clean & rm -f config.h & git reset --hard origin/base`
+- Apply patches (this has to be done only once for each branch (except updates))
+  - Create and switch to a new branch for the patch with `git branch <feature>`
+  - Download the `.diff` file of the according feature into your directory
+  - Apply the patch to the current directory with `git apply <feature>.diff`
+  - Add and commit all the files in the `<feature>` branch
+- Merge all branches into master branch (sometimes you can skip already merged
+ones)
+  - Merge each branch (except the new feature) into master with `git merge <feature>`
+    - (maybe you have to manually merge some errors)
+- If you have a `config` branch merge `config` into `master` before adding the
+new `feature`
+- Finally update the `config` branch
+  - If not created already create a `config` branch from the `base` branch
+  - Get the `config.def.h` of `master` into `config` with
+  `git checkout master config.def.h`