sysutils/openipmi: resolve build issues with 2.0.21

- Return EAGAIN errno instead of EKEYREJECTED to fix build with SSL option [1]
- Prepend -I../include to CPPFLAGS to stop build breakage from old .h files [2]
- While here, add LICENSE and regen one of the original patches (portlint)

PR:		202002 [1]
PR:		202528 [2]
Submitted by:	dennis.noordsij@helsinki.fi [1]
Submitted by:	Anton Sayetsky <vsasjason@gmail.com> [1]
Submitted by:	Larry Rosenman <ler@lerctr.org> [2]
Approved by:	feld (mentor)
Differential Revision:	https://reviews.freebsd.org/D3568

sysutils/openipmi/Makefile

@@ -10,6 +10,8 @@ DISTNAME=	OpenIPMI-${PORTVERSION}
 MAINTAINER=	ports@FreeBSD.org
 COMMENT=	Complex IPMI management software
 
+LICENSE=	GPLv2
+
 LIB_DEPENDS=	libpopt.so:${PORTSDIR}/devel/popt
 
 GNU_CONFIGURE=	yes
@@ -17,7 +19,7 @@ INSTALL_TARGET=	install-strip
 USES=		execinfo gmake libtool pathfix pkgconfig
 USE_LDCONFIG=	yes
 
-CPPFLAGS+=	-I${LOCALBASE}/include
+CPPFLAGS+=	-I../include -I${LOCALBASE}/include
 LDFLAGS+=	-L${LOCALBASE}/lib
 
 OPTIONS_DEFINE=	SSL SNMP PERL PYTHON TCL TKINTER GDBM

sysutils/openipmi/files/patch-OpenIPMIpthread.pc.in

@@ -1,6 +1,6 @@
---- OpenIPMIpthread.pc.in.orig	2005-08-17 05:56:02.000000000 +0200
-+++ OpenIPMIpthread.pc.in	2013-02-28 09:55:49.000000000 +0100
-@@ -6,6 +6,6 @@
+--- OpenIPMIpthread.pc.in.orig	2012-07-21 22:01:45 UTC
++++ OpenIPMIpthread.pc.in
+@@ -6,6 +6,6 @@ includedir=@includedir@
  Name: OpenIPMIpthread
  Description: Pthread OS handler for OpenIPMI
  Version: @VERSION@

sysutils/openipmi/files/patch-lib_rakp.c

@@ -0,0 +1,11 @@
+--- lib/rakp.c.orig	2015-08-19 12:52:44 UTC
++++ lib/rakp.c
+@@ -482,7 +482,7 @@
+ 	return EINVAL;
+     HMAC(rinfo->evp_md, p, rinfo->key_len, idata, 58+idata[57], integ_data, &ilen);
+     if (memcmp(data+40, integ_data, rinfo->key_len) != 0)
+-	return EKEYREJECTED;
++	return EAGAIN;
+ 
+     /* Now generate the SIK */
+     p = ipmi_rmcpp_auth_get_my_rand(info->ainfo, &plen);