Merge d332f4476b into 8a773856de

Prior to this change, running the example from the docs without root privs produces this misleading/confusing output that claims that the software was installed when it wasn't:

```console
$ wget -qO - https://raw.githubusercontent.com/cupcakearmy/autorestic/master/install.sh | bash
linux
amd64
/usr/local/bin/autorestic.bz2: Permission denied
bzip2: Can't open input file /usr/local/bin/autorestic.bz2: No such file or directory.
chmod: cannot access '/usr/local/bin/autorestic': No such file or directory
bash: line 49: autorestic: command not found
Successfully installed autorestic
```

With this change, the errors stop the script much earlier and produce this output instead:

```
linux
amd64
/usr/local/bin/autorestic.bz2: Permission denied
```

install.sh

@@ -1,5 +1,5 @@
 #!/bin/bash
-
+set -e -o pipefail
 shopt -s nocaseglob
 
 OUT_FILE=/usr/local/bin/autorestic

internal/cron.go

@@ -1,12 +1,22 @@
 package internal
 
+import (
+	"errors"
+	"fmt"
+)
+
 func RunCron() error {
 	c := GetConfig()
+	var errs []error
 	for name, l := range c.Locations {
 		l.name = name
 		if err := l.RunCron(); err != nil {
-			return err
+			errs = append(errs, err)
 		}
 	}
+
+	if len(errs) > 0 {
+		return fmt.Errorf("Encountered errors during cron process:\n%w", errors.Join(errs...))
+	}
 	return nil
 }

internal/location.go

@@ -1,6 +1,7 @@
 package internal
 
 import (
+	"errors"
 	"fmt"
 	"io/ioutil"
 	"os"
@@ -446,7 +447,10 @@ func (l Location) RunCron() error {
 	now := time.Now()
 	if now.After(next) {
 		lock.SetCron(l.name, now.Unix())
-		l.Backup(true, "")
+		errs := l.Backup(true, "")
+		if len(errs) > 0 {
+			return fmt.Errorf("Failed to backup location \"%s\":\n%w", l.name, errors.Join(errs...))
+		}
 	} else {
 		if !flags.CRON_LEAN {
 			colors.Body.Printf("Skipping \"%s\", not due yet.\n", l.name)