initialize ex_pathlen to -1 so it isn't checked if pathlen
is not present.
set ucert to NULL in apps/pkcs12.c otherwise it gets freed
twice.
remove extraneous '\r' in MIME encoder.
Allow a NULL to be passed to X509_gmtime_adj()
Make PKCS#7 code use definite length encoding rather then
the indefinite stuff it used previously.
like Malloc, Realloc and especially Free conflict with already existing names
on some operating systems or other packages. That is reason enough to change
the names of the OpenSSL memory allocation macros to something that has a
better chance of being unique, like prepending them with OPENSSL_.
This change includes all the name changes needed throughout all C files.
