[xmlsec] Create a .pem file

[Aleksey Sanin]

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>I meant : why creating .c files if I use xmlsec?
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xmlsec application is only a demonstration on how XMLSec library
may be used. It can be usefull in simple cases when you just need to
sign/verify or encrypt/decrypt one XML file. However, in case you have
a custom application that has special requirements it might be more
simple to embed XMLSec library into your application directly.

Aleksey