in_syslog: add expansion for ident and msg-id in tag

[jiping-s]

Allow * in tag, e.g. syslog/*/*/. Wildcard chars are to be expanded to <ident> and <msg-id> fields.

One and only * is expanded to <ident>, and an optional, second * is expanded to <msg-id>.

A test runtime/in_syslog.c has been added to verify the tag expansion functionality - it does not involve any real syslog service.

Signed-off-by: Ji-Ping Shen [email protected]

[jstaffans]

@edsiper, is this something that could be considered upstream? It would be pretty useful in some cases, given that tag manipulation is not really supported yet by Fluent Bit.

[edsiper]

Sorry for the late reply.

• please rebase on top of git master
• re-write the 'fill' function using normal msgpack-c API if needed

[niedbalski]

@jiping-s

Please rebase your latest changes if still interested to land this functionality. If not, please let me know to close this PR.

Thank you.