Added a port for xmlsec library

[SvenPStarFinanz]

Should work on Windows, Linux, OSX.

[msftclas]

All CLA requirements met.

[SvenPStarFinanz]

Have to work on static triplet.

[MVoz]

vcpkg_check_linkage(ONLY_STATIC_LIBRARY)

[MVoz]

@SvenPStarFinanz
why shut down? dynamically also compiled through the original configurator

need to watch variables

[MVoz]

debug dynamic

set(STATIC 0)
set(WITH_DL 1)

# .\configure.txt
# This file is generated automatically by configure.js.

XMLSEC_VERSION_MAJOR=1
XMLSEC_VERSION_MINOR=2
XMLSEC_VERSION_SUBMINOR=28
BASEDIR=..
XMLSEC_SRCDIR=..\src
APPS_SRCDIR=..\apps
BINDIR=binaries
WITH_CRYPTO=mscrypto
WITH_DEFAULT_CRYPTO=mscrypto
WITH_OPENSSL=0
WITH_OPENSSL_VERSION=XMLSEC_OPENSSL_
WITH_NSS=0
WITH_MSCRYPTO=1
WITH_MSCNG=0
WITH_LIBXSLT=1
WITH_ICONV=1
WITH_NT4=1
UNICODE=1
DEBUG=1
WERROR=0
CC=cl.exe
CFLAGS=/MDd
STATIC=0
WITH_DL=1
PREFIX=E:\tools\vcpkg\installed\x64-windows\debug
BINPREFIX=$(PREFIX)\bin
INCPREFIX=$(PREFIX)\include
LIBPREFIX=$(PREFIX)\lib
SOPREFIX=$(PREFIX)\bin
INCLUDE=$(INCLUDE);.
LIB=$(LIB);.
CRUNTIME=/MDd

[SvenPStarFinanz]

I had some problems with git handling. Resubmitted in #7196 now.