OPNSense/core 335100fsrc/www system_certmanager.php

Trust, import csr. move csr_info and csr_info_json  commands to post to prevent sending large / possible illegal blobs of data in uri. closes https://github.com/opnsense/core/issues/3538

(cherry picked from commit 6b92b8170271335a80a8beb971c3fdf63160478f)
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+27-34src/www/system_certmanager.php
+27-341 files

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