Update ruby-httpclient to 2.7.1.

pkgsrc changes:
* Add completely support for pkg_alternatives (adding ALTERNATIVES).
* Remove ruby18 specific description in Makefile.

Changes in 2.7.1

Jan 1, 2016 - version 2.7.1

* Changes

  - Symbol aware header key comparison
    Normalizes symbol to String for header key.
    nahi/httpclient#278

  - Show warning message only once
    Added HTTPClient::Util.warning that cached warning message and supress
    the message if it's already dumped.
  - Use Timeout.timeout instead of Kernel.timeout that is deprecated from
    ruby 2.3.0.

* Bug fixes

  - [JRuby] Set ssl_version properly

www/ruby-httpclient/ALTERNATIVES

@@ -0,0 +1 @@
+bin/httpclient @PREFIX@/bin/httpclient@RUBY_SUFFIX@

www/ruby-httpclient/Makefile

@@ -1,7 +1,7 @@
-# $NetBSD: Makefile,v 1.19 2015/12/13 15:37:44 taca Exp $
+# $NetBSD: Makefile,v 1.20 2016/01/03 08:12:11 taca Exp $
 #
 
-DISTNAME=	httpclient-2.7.0.1
+DISTNAME=	httpclient-2.7.1
 CATEGORIES=	www
 
 MAINTAINER=	[email protected]
@@ -11,9 +11,6 @@ LICENSE=	ruby-license
 
 USE_LANGUAGES=	# none
 
-# OK with ruby-1.9 buitin one, but not with ruby18's one.
-RUBY_RDOC_REQD=	2.5.8
-
 RUBYGEM_OPTIONS+=	--format-executable
 
 .include "../../lang/ruby/gem.mk"

www/ruby-httpclient/distinfo

@@ -1,6 +1,6 @@
-$NetBSD: distinfo,v 1.18 2015/12/13 15:37:44 taca Exp $
+$NetBSD: distinfo,v 1.19 2016/01/03 08:12:11 taca Exp $
 
-SHA1 (httpclient-2.7.0.1.gem) = e546f71fd64c0f69e258039ca0afe7b3e5c0a1b5
-RMD160 (httpclient-2.7.0.1.gem) = b5d27aa47f7467bd9dc3d1b0cbb6a49ec1a7e967
-SHA512 (httpclient-2.7.0.1.gem) = cf6c3b86a34acef60d3a0e8740057b55869cd5217fd38dc8c0ae0375e9c75ce7e5a9889c7a27ab27875f0418e10f1013724efee1b50a08efc6898ade58dde15b
-Size (httpclient-2.7.0.1.gem) = 378368 bytes
+SHA1 (httpclient-2.7.1.gem) = 5d0a605e42a7f591734c05c494b9b58aba162a5c
+RMD160 (httpclient-2.7.1.gem) = 293321725112a038f78f727cfe757c3b46db291a
+SHA512 (httpclient-2.7.1.gem) = 11b2d7a17a89d40139641586b3257384b695fc8041a91584a8f86c8ccb81fdc64aea5f5947a5982fb0e8bd27a3d52ead1d7ec302ee85c28a184be7055f9500a1
+Size (httpclient-2.7.1.gem) = 378880 bytes