Renaming was done with shell commands, git mv for moving the files and content like
find -iname '*.c' | xargs sed -i 's/ikev1/ike/g' respecting the different mixes of upper/lower case.
alert ikev2 any any -> any any (msg:"SURICATA IKEv2 malformed request data"; flow:to_server; app-layer-event:ikev2.malformed_data; classtype:protocol-command-decode; sid:2224000; rev:1;)
alert ikev2 any any -> any any (msg:"SURICATA IKEv2 malformed response data"; flow:to_client; app-layer-event:ikev2.malformed_data; classtype:protocol-command-decode; sid:2224001; rev:1;)
alert ikev2 any any -> any any (msg:"SURICATA IKEv2 weak cryptographic parameters (Encryption)"; flow:to_client; app-layer-event:ikev2.weak_crypto_enc; classtype:protocol-command-decode; sid:2224002; rev:1;)
alert ikev2 any any -> any any (msg:"SURICATA IKEv2 weak cryptographic parameters (PRF)"; flow:to_client; app-layer-event:ikev2.weak_crypto_prf; classtype:protocol-command-decode; sid:2224003; rev:1;)
alert ikev2 any any -> any any (msg:"SURICATA IKEv2 weak cryptographic parameters (Auth)"; flow:to_client; app-layer-event:ikev2.weak_crypto_auth; classtype:protocol-command-decode; sid:2224004; rev:2;)
alert ikev2 any any -> any any (msg:"SURICATA IKEv2 weak cryptographic parameters (Diffie-Hellman)"; flow:to_client; app-layer-event:ikev2.weak_crypto_dh; classtype:protocol-command-decode; sid:2224005; rev:2;)
alert ikev2 any any -> any any (msg:"SURICATA IKEv2 no Diffie-Hellman exchange parameters"; flow:to_client; app-layer-event:ikev2.weak_crypto_nodh; classtype:protocol-command-decode; sid:2224006; rev:1;)
alert ikev2 any any -> any any (msg:"SURICATA IKEv2 no authentication"; flow:to_client; app-layer-event:ikev2.weak_crypto_noauth; classtype:protocol-command-decode; sid:2224007; rev:1;)
alert ikev2 any any -> any any (msg:"SURICATA IKEv2 no encryption (AH)"; flow:to_client; app-layer-event:ikev2.no_encryption; classtype:protocol-command-decode; sid:2224008; rev:1;)
alert ikev2 any any -> any any (msg:"SURICATA IKEv2 invalid proposal"; flow:to_server; app-layer-event:ikev2.invalid_proposal; classtype:protocol-command-decode; sid:2224009; rev:1;)
alert ikev2 any any -> any any (msg:"SURICATA IKEv2 invalid proposal selected"; flow:to_client; app-layer-event:ikev2.invalid_proposal; classtype:protocol-command-decode; sid:2224010; rev:1;)
alert ikev2 any any -> any any (msg:"SURICATA IKEv2 unknown proposal"; flow:to_server; app-layer-event:ikev2.unknown_proposal; classtype:protocol-command-decode; sid:2224011; rev:1;)
alert ikev2 any any -> any any (msg:"SURICATA IKEv2 unknown proposal selected"; flow:to_client; app-layer-event:ikev2.unknown_proposal; classtype:protocol-command-decode; sid:2224012; rev:1;)
alert ike any any -> any any (msg:"SURICATA IKE malformed request data"; flow:to_server; app-layer-event:ike.malformed_data; classtype:protocol-command-decode; sid:2224000; rev:2;)
alert ike any any -> any any (msg:"SURICATA IKE malformed response data"; flow:to_client; app-layer-event:ike.malformed_data; classtype:protocol-command-decode; sid:2224001; rev:2;)
alert ike any any -> any any (msg:"SURICATA IKE weak cryptographic parameters (Encryption)"; flow:to_client; app-layer-event:ike.weak_crypto_enc; classtype:protocol-command-decode; sid:2224002; rev:2;)
alert ike any any -> any any (msg:"SURICATA IKE weak cryptographic parameters (PRF)"; flow:to_client; app-layer-event:ike.weak_crypto_prf; classtype:protocol-command-decode; sid:2224003; rev:2;)
alert ike any any -> any any (msg:"SURICATA IKE weak cryptographic parameters (Auth)"; flow:to_client; app-layer-event:ike.weak_crypto_auth; classtype:protocol-command-decode; sid:2224004; rev:3;)
alert ike any any -> any any (msg:"SURICATA IKE weak cryptographic parameters (Diffie-Hellman)"; flow:to_client; app-layer-event:ike.weak_crypto_dh; classtype:protocol-command-decode; sid:2224005; rev:3;)
alert ike any any -> any any (msg:"SURICATA IKE no Diffie-Hellman exchange parameters"; flow:to_client; app-layer-event:ike.weak_crypto_nodh; classtype:protocol-command-decode; sid:2224006; rev:2;)
alert ike any any -> any any (msg:"SURICATA IKE no authentication"; flow:to_client; app-layer-event:ike.weak_crypto_noauth; classtype:protocol-command-decode; sid:2224007; rev:2;)
alert ike any any -> any any (msg:"SURICATA IKE no encryption (AH)"; flow:to_client; app-layer-event:ike.no_encryption; classtype:protocol-command-decode; sid:2224008; rev:2;)
alert ike any any -> any any (msg:"SURICATA IKE invalid proposal"; flow:to_server; app-layer-event:ike.invalid_proposal; classtype:protocol-command-decode; sid:2224009; rev:2;)
alert ike any any -> any any (msg:"SURICATA IKE invalid proposal selected"; flow:to_client; app-layer-event:ike.invalid_proposal; classtype:protocol-command-decode; sid:2224010; rev:2;)
alert ike any any -> any any (msg:"SURICATA IKE unknown proposal"; flow:to_server; app-layer-event:ike.unknown_proposal; classtype:protocol-command-decode; sid:2224011; rev:2;)
alert ike any any -> any any (msg:"SURICATA IKE unknown proposal selected"; flow:to_client; app-layer-event:ike.unknown_proposal; classtype:protocol-command-decode; sid:2224012; rev:2;)