pkg-config fails after update to 1.6.0 of security/libssh2

[Chad J. Milios]

one thing i noticed this break is the LIBSSH2 option on multimedia/vlc.

fix is attached. if attachment gets stripped off of email to list, it's 
available at https://nuos.org/security_libssh2.diff . if this link is 
broken it's because a fix has been committed to ports tree.
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Index: Makefile
===================================================================
--- Makefile	(revision 397608)
+++ Makefile	(working copy)
@@ -3,7 +3,7 @@
 
 PORTNAME=	libssh2
 PORTVERSION=	1.6.0
-PORTREVISION=	0
+PORTREVISION=	1
 PORTEPOCH=	2
 CATEGORIES=	security devel
 MASTER_SITES=	http://www.libssh2.org/download/ \
@@ -48,4 +48,8 @@
 		${WRKSRC}/configure
 .endif
 
+post-build:
+	@${REINPLACE_CMD} -E -e '/Requires.private:/{s/[[:<:]]zlib[[:>:]]//;s/,,/,/;s/ ,/ /;s/,$$//;}' \
+		${WRKSRC}/libssh2.pc
+
 .include <bsd.port.post.mk>