Update doc/PRIVILEGES

Correction of wrong syntax in the examples (=> instead of =)
Merge pull request #86 from Rixcho/patch-1

Update doc/PRIVILEGES
memoserv/delete: Only accept numeric indexes.
sasl: extend length of valid SASL mechanisms from 21 to 60 bytes
sasl: add prototype ECDSA-NIST256P-CHALLENGE SASL mechanism
saslserv/ecdsa-nist256p-challenge: advance mechanism state after accname (oops)
Merge pull request #88 from grawity/memoserv-strtoul

memoserv/delete: Only accept numeric indexes.
ecdsa-nist256p-challenge: copy-paste fix
saslserv/ecdsa-nist256p-challenge: use p->username instead of local var
ecdsa-nist256p-challenge: allow using a static debug challenge vector for testing via telnet (usefulness pointed out by KindOne)
saslserv/main: allow longer SASL mech names
saslserv/main: Grow the mech buffer for room

If we're going to allow bigger mechanism names, we need to have the
space to hold the name.
src/ecdsakeygen: add tool for generating ecdsa-nist256p-challenge keypairs
Add ecdsadecode tool.
ecdsakeygen: squelch warnings
ecdsa-nist256p-challenge: fixups
ecdsakeygen: fix issues pointed out by Aaron M.D. Jones.
ecdsakeygen: use compressed point-conversion form
ecdsadecode: use shadowed pointer to make openssl happy
ecdsadecode: cleanups pointed out by Aaron M.D. Jones.