lib-ssl-iostream: Add ssl_iostream_context cache This can be used to easily get a shared ssl_iostream_context for either server or client. There's no upper size limit for the cache.

lib-ssl-iostream: Remove libdovecot_openssl_common.la Using such a library results in the same code being duplicated (in OSX) in both libssl_iostream_openssl.so and libdcrypt_openssl.so. This breaks the idea of openssl_init_refcount, because each one will have their own one. libdcrypt_openssl.so now links to libssl_iostream_openssl.so, which shouldn't really be a problem, because lib-ssl-iostream is part of the core libdovecot.so already. It would have been possible to also install libdovecot_openssl_common.so and link it to both libssl_iostream_openssl.so and libdcrypt_openssl.so, but that seems unnecessarily complicated.

lib-ssl-iostream: Remove empty $(ssl_sources) from Makefile

OpenSSL: link against OpenSSL libs explicitly

dovecot: Remove ssl-params

lib-dcrypt, lib-ssl-iostream: Share OpenSSL init/deinit code.

lib-ssl-iostream now dynamically loads openssl library instead of linking to it. This allowed removing the separate libdovecot-ssl library. In future if GnuTLS/NSS support is added it would also allow switching between them dynamically.

Makefile: iostream-*ssl.h wasn't being installed.

Makefile: Added missing headers to tarball

Removed duplicate libdovecot-ssl

lib-ssl-iostream: Use SSL_LIBS when linking the shared library.

Fixed compiling without OpenSSL.

Compile fix for previous change.

Makefile: Fixes to compiling with LDFLAGS="-Wl,--as-needed -Wl,--no-undefined"

Added lib-ssl-iostream for handling SSL connections more easily.