Update ExecReload command in x-ui.service.debian (#5219)

* Update ExecReload command in x-ui.service.debian

* fix(systemd): use absolute path in ExecReload for arch and rhel units

systemd requires absolute executable paths; kill -USR1 $MAINPID fails
with 'Executable path is not absolute'. Matches the debian unit fix.

---------

Co-authored-by: MHSanaei <[email protected]>

x-ui.service.arch

@@ -9,7 +9,7 @@ Environment="XRAY_VMESS_AEAD_FORCED=false"
 Type=simple
 WorkingDirectory=/usr/local/x-ui/
 ExecStart=/usr/local/x-ui/x-ui
-ExecReload=kill -USR1 $MAINPID
+ExecReload=/bin/kill -USR1 $MAINPID
 Restart=on-failure
 RestartSec=5s
 

x-ui.service.debian

@@ -9,7 +9,7 @@ Environment="XRAY_VMESS_AEAD_FORCED=false"
 Type=simple
 WorkingDirectory=/usr/local/x-ui/
 ExecStart=/usr/local/x-ui/x-ui
-ExecReload=kill -USR1 $MAINPID
+ExecReload=/bin/kill -USR1 $MAINPID
 Restart=on-failure
 RestartSec=5s
 

x-ui.service.rhel

@@ -9,7 +9,7 @@ Environment="XRAY_VMESS_AEAD_FORCED=false"
 Type=simple
 WorkingDirectory=/usr/local/x-ui/
 ExecStart=/usr/local/x-ui/x-ui
-ExecReload=kill -USR1 $MAINPID
+ExecReload=/bin/kill -USR1 $MAINPID
 Restart=on-failure
 RestartSec=5s