Prepare for 3.0 alpha 15

Reviewed-by: Tomas Mraz <tomas@openssl.org>

CHANGES.md

@@ -21,7 +21,7 @@ OpenSSL Releases
 OpenSSL 3.0
 -----------
 
-### Changes between 1.1.1 and 3.0 alpha 14 [8 Apr 2021]
+### Changes between 1.1.1 and 3.0 [xx XXX xxxx]
 
  * A public key check is now performed during EVP_PKEY_derive_set_peer().
    Previously DH was internally doing this during EVP_PKEY_derive().

NEWS.md

@@ -18,7 +18,7 @@ OpenSSL Releases
 OpenSSL 3.0
 -----------
 
-### Major changes between OpenSSL 1.1.1 and OpenSSL 3.0 alpha 14 [in pre-release]
+### Major changes between OpenSSL 1.1.1 and OpenSSL 3.0 [under development]
 
   * Changed the license to the Apache License v2.0.
   * Moved all variations of the EVP ciphers CAST5, BF, IDEA, SEED, RC2,

VERSION.dat

@@ -1,7 +1,7 @@
 MAJOR=3
 MINOR=0
 PATCH=0
-PRE_RELEASE_TAG=alpha14
+PRE_RELEASE_TAG=alpha15-dev
 BUILD_METADATA=
-RELEASE_DATE="8 Apr 2021"
+RELEASE_DATE=""
 SHLIB_VERSION=3