hipchat import should support encrypted tar.gz as the default format

hipchat importer asks for zip files as input. however, hipchat produces tar.gz as input by default. this makes for a high degree of inconvenience.

In addition, hipchat is mandatorily encrypting its tar.gz using aes - it would be super convenient if you guys could take a password and take the encrypted file itself.

the command to decrypt is

openssl aes-256-cbc -d -in hipchat-124688-2018-09-19_18-28-04.tar.gz.aes -out hipchat-124688-2018-09-19_18-28-04.tar.gz -pass pass:somepassword -md md5

do note that the commandline given in the helpfiles is incorrect because it does not specify md5. it so happens that hipchat is using an old version of openssl to encrypt (that uses md5 by default) and since then it has been changed to sha256. so if you are using on a newer linux laptop, that command will error out.

https://git.openssl.org/?p=openssl.git;a=commit;h=9e8b6f042749ded556380227c9f2db7ffad9a3aa