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
if (node.connman) node.connman->Stop();
    StopTorControl();
    
    
    if (node.scheduler) node.scheduler->stop();
    if (node.chainman && node.chainman->m_load_block.joinable()) node.chainman->m_load_block.join();
    StopScriptCheckWorkerThreads();
    
    
    node.peerman.reset();
    node.connman.reset();
    node.banman.reset();
    node.addrman.reset();
    node.netgroupman.reset();
    if (node.mempool && node.mempool->GetLoadTried() && ShouldPersistMempool(*node.args)) {
        DumpMempool(*node.mempool, MempoolPath(*node.args));
    }
    
    if (node.fee_estimator) node.fee_estimator->Flush();
    
    if (node.chainman) {
        LOCK(cs_main);
        for (Chainstate* chainstate : node.chainman->GetAll()) {
            if (chainstate->CanFlushToDisk()) {
                chainstate->ForceFlushStateToDisk();
            }
        }
    }