Bug#843199: perf is linked to libcrypto - licence incompatibility

[Ben Hutchings <ben@decadent.org.uk>]

Package: src:linux
Version: 4.7.8-1
Severity: serious

perf uses SHA1 and MD5 implementations from OpenSSL's libcrypto if it
is found at build time.  Since perf is under GPLv2 without an OpenSSL
exception, this isn't allowed in Debian.

We need to disable this feature or substitute implementations under
another licence.

Ben.

-- System Information:
Debian Release: stretch/sid
  APT prefers unstable-debug
  APT policy: (500, 'unstable-debug'), (500, 'stable-updates'), (500, 'unstable'), (500, 'stable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.8.0-1-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)