more utilities.

Merge some common functionality in the apps, delete
the encryption option in the pkcs7 utility (they never
did anything) and add a couple more options to pkcs7.

pages.

Update docs, change 'ca' to use the new callback parameter. Now moved key_callback
into app.c because some other utilities will use it soon.

some utilities that should have used RANDFILE did not,
and -rand handling was broken except in genrsa.

a pain to read when using 4-space tabs.

in cryptlib.h (which is often included as "../cryptlib.h"), then the
question remains relative to which directory this is to be interpreted.
gcc went one further directory up, as intended; but makedepend thinks
differently, and so probably do some C compilers.  So the ../ must go away;
thus e_os.h goes back into include/openssl (but I now use
#include "openssl/e_os.h" instead of <openssl/e_os.h> to make the point) --
and we have another huge bunch of dependency changes.  Argh.

include file.

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