Update cheatsheets

tldr/linux/crond

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+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# crond
+
+> Daemon to execute scheduled commands from crontab files.
+> More information: <https://manned.org/crond>.
+
+- Start daemon in the background and check for scheduled commands:
+
+`crond`
+
+- Start daemon in the foreground and check for scheduled commands:
+
+`crond -n`
+
+- Send job output from the daemon to the system log:
+
+`crond -s`
+
+- Override default limitations and accept custom crontables:
+
+`crond -p`
+
+- Inherit crontab file path from environment settings:
+
+`crond -P`