The `make install` script, which most users would run via `sudo` to install into `/usr/local`, will use the current umask of the root user when creating certain files and directories. If one uses a restrictive umask by default (e.g. `umask 077`), this means that only the root user will be able to use the full Bitcoin package.

**Expected behavior**

The install script creates all directories and files, including man pages, etc., with permissions `644` / `755`.

**Actual behavior**

Certain folders are created using the default umask, e.g.:

- /usr/local/share/man/man1/
- /usr/local/lib/pkgconfig/
- [...]

This means that only root can access files in these folders and other users won't be able to read the man pages (for example).

**To reproduce**

```bash
$ ./autogen.sh
$ make
$ sudo -iu root
% umask 077
% make install
```

**System information**

OS: Linux
bitcoind version: HEAD
#include <addrman.h>
#include <banman.h>
#include <blockfilter.h>
#include <chain.h>
#include <chainparams.h>
#include <consensusamount.h>
#include <deploymentstatus.h>
#include <fs.h>
#include <hash.h>
#include <httprpc.h>
#include <httpserver.h>
#include <indexblockfilterindex.h>
#include <indexcoinstatsindex.h>
#include <indextxindex.h>
#include <initcommon.h>
#include <interfaceschain.h>
#include <interfacesinit.h>
#include <interfacesnode.h>
#include <mapport.h>
#include <net.h>
#include <net_permissions.h>
#include <net_processing.h>
#include <netbase.h>
#include <netgroup.h>
#include <nodeblockstorage.h>
#include <nodecaches.h>
#include <nodechainstate.h>
#include <nodechainstatemanager_args.h>
#include <nodecontext.h>
#include <nodeinterface_ui.h>