Make https://doc.zih.tu-dresden.de/software/private_modules/ follow the content rules

https://doc.zih.tu-dresden.de/software/private_modules/ has multiple issues, suggestions are:

• Replace p_projectname with p_marie
• Remove occurrences of lmod (e. g. "Notify lmod" can be replaced by "Make module command aware of private modules" or similar)
• Tell the reader why ulimit -c is relevant here and explain what that command does.
• Maybe explain how to directly build it in directory /projects instead of home directory?