global: Use check-local in Makefile.am instead of overriding check directly This helps with dependency problems, like running "make check" in lib-storage without "make" first would try to compile the test programs too early and fail.

mail-crypt: Fix linking order

mail-crypt: Skip undef values if OpenSSL is <1.0.2 OpenSSL 1.0.1 and earlier generate undef warnings due to using stack as randomness source in a way that valgrind does not like, so we disable undef value checks for mail-crypt-plugin.

mail-crypt: Add mail-crypt plugin