Base the generated openssl.def on existing zlib.def. We cannot specify
more than one DEF file per executable so we need to merge the two DEF
files to expose both OpenSSL and Zlib functionality to addons.

If OpenSSL is not used, link against zlib.def itself.

PR-URL: #7983
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: James M Snell <jasnell@gmail.com>

Notable changes:

* build: zlib symbols and additional OpenSSL symbols are now exposed on Windows platforms. (Alex Hultman) #7983 and #7576
* child_process, cluster: Forked child processes and cluster workers now support stdio configuration. (Colin Ihrig) #7811 and #7838
* fs: fs.ReadStream now exposes the number of bytes it has read so far. (Linus Unnebäck) #7942
* repl: The REPL now supports editor mode. (Prince J Wesley) #7275
* util: inspect() can now be configured globally using util.inspect.defaultOptions. (Roman Reiss) #8013

Refs: #8020
PR-URL: #8070

Notable changes:

* build: zlib symbols and additional OpenSSL symbols are now exposed on Windows platforms. (Alex Hultman) #7983 and #7576
* child_process, cluster: Forked child processes and cluster workers now support stdio configuration. (Colin Ihrig) #7811 and #7838
* child_process: argv[0] can now be set to arbitrary values in spawned processes. (Pat Pannuto) #7696
* fs: fs.ReadStream now exposes the number of bytes it has read so far. (Linus Unnebäck) #7942
* repl: The REPL now supports editor mode. (Prince J Wesley) #7275
* util: inspect() can now be configured globally using util.inspect.defaultOptions. (Roman Reiss) #8013

Refs: #8020
PR-URL: #8070

Notable changes:

* build: zlib symbols and additional OpenSSL symbols are now exposed on Windows platforms. (Alex Hultman) #7983 and #7576
* child_process, cluster: Forked child processes and cluster workers now support stdio configuration. (Colin Ihrig) #7811 and #7838
* child_process: argv[0] can now be set to arbitrary values in spawned processes. (Pat Pannuto) #7696
* fs: fs.ReadStream now exposes the number of bytes it has read so far. (Linus Unnebäck) #7942
* repl: The REPL now supports editor mode. (Prince J Wesley) #7275
* util: inspect() can now be configured globally using util.inspect.defaultOptions. (Roman Reiss) #8013

Refs: #8020
PR-URL: #8070

Notable changes:

* build: zlib symbols and additional OpenSSL symbols are now exposed on Windows platforms. (Alex Hultman) nodejs#7983 and nodejs#7576
* child_process, cluster: Forked child processes and cluster workers now support stdio configuration. (Colin Ihrig) nodejs#7811 and nodejs#7838
* child_process: argv[0] can now be set to arbitrary values in spawned processes. (Pat Pannuto) nodejs#7696
* fs: fs.ReadStream now exposes the number of bytes it has read so far. (Linus Unnebäck) nodejs#7942
* repl: The REPL now supports editor mode. (Prince J Wesley) nodejs#7275
* util: inspect() can now be configured globally using util.inspect.defaultOptions. (Roman Reiss) nodejs#8013

Refs: nodejs#8020
PR-URL: nodejs#8070