use consistent systemd boolean style

Author: thestinger

systemd/system/remote-backup.service

@@ -6,27 +6,27 @@ CapabilityBoundingSet=CAP_CHOWN CAP_DAC_OVERRIDE CAP_FOWNER
 CPUSchedulingPolicy=batch
 ExecStart=/usr/local/bin/remote-backup
 IOSchedulingPriority=7
-LockPersonality=true
-MemoryDenyWriteExecute=true
+LockPersonality=yes
+MemoryDenyWriteExecute=yes
 Nice=19
-NoNewPrivileges=true
-PrivateDevices=true
-PrivateIPC=true
-PrivateTmp=true
+NoNewPrivileges=yes
+PrivateDevices=yes
+PrivateIPC=yes
+PrivateTmp=yes
 ProcSubset=pid
-ProtectClock=true
-ProtectControlGroups=true
-ProtectHostname=true
-ProtectKernelLogs=true
-ProtectKernelModules=true
-ProtectKernelTunables=true
+ProtectClock=yes
+ProtectControlGroups=yes
+ProtectHostname=yes
+ProtectKernelLogs=yes
+ProtectKernelModules=yes
+ProtectKernelTunables=yes
 ProtectProc=invisible
 ProtectSystem=strict
-RemoveIPC=true
+RemoveIPC=yes
 RestrictAddressFamilies=AF_INET AF_INET6 AF_UNIX
-RestrictNamespaces=true
-RestrictRealtime=true
-RestrictSUIDSGID=true
+RestrictNamespaces=yes
+RestrictRealtime=yes
+RestrictSUIDSGID=yes
 SystemCallArchitectures=native
 SystemCallFilter=@system-service
 SystemCallFilter=~@obsolete