Updated chapter 02, Features Defined as C Pre-processor Macro. In add…

…ition, I also created a shared wolfSSL Macro Documentation sheets in hopes that it can be updated as new macros are created so we have an ongoing, easy to reference list.

Here is the link that can only be accessed by being apart of the wolfSSL engineering shared drive: https://docs.google.com/spreadsheets/d/10rEf_mU7xul9BoIebyhasugUxSXVuHXhkkb7bnbtjXA/edit?usp=sharing
- spelling fixes and corrections.

wolfSSL/src/chapter02.md

@@ -440,11 +440,11 @@ Used for compiling out special characters that embedded devices may have problem
 
 #### NO_OLD_SSL_NAMES
 
-Removes unended namespace.
+Removes unneeded namespace.
 
 #### NO_OLD_WC_NAMES
 
-Removes unended namespace.
+Removes unneeded namespace.
 
 #### NO_OLD_POLY1305
 
@@ -500,7 +500,7 @@ No default ticket encryption callback, server only. The application must set its
 
 #### WOLFSSL_NO_SOCK
 
-Board-specific, no sock platform.
+Board-specific, no socket platform.
 
 #### WOLFSSL_NO_TLS12
 
@@ -936,23 +936,23 @@ Used as a guard on redeclaration.
 
 #### WOLFSSL_DH_TYPE_DEFINED
 
-Used as redeclaration gaurd for DH.
+Used as redeclaration guard for DH.
 
 #### WOLFSSL_DSA_TYPE_DEFINED
 
-Used as redeclaration gaurd for DSA.
+Used as redeclaration guard for DSA.
 
 #### WOLFSSL_EC_TYPE_DEFINED
 
-Used as redeclaration gaurd for EC.
+Used as redeclaration guard for EC.
 
 #### WOLFSSL_RSA_TYPE_DEFINED
 
-Used as redeclaration gaurd for RSA.
+Used as redeclaration guard for RSA.
 
 #### WOLFSSL_ECDSA_TYPE_DEFINED
 
-Used as redeclaration gaurd for ECDSA.
+Used as redeclaration guard for ECDSA.
 
 #### WOLFSSL_DTLS_EXPORT_TYPES
 
@@ -1024,11 +1024,11 @@ Implements the use of AEAD and is required for TLS 1.3.
 
 #### HAVE_AES_CBC
 
-Used In the case when Static RSA is needed.
+Enable option for AES.
 
 #### HAVE_AES_DECRYPT
 
-Enables AES to decrypt symmetric cypher.
+This setting controls whether the decrypt direction of the various AES modes is supported.
 
 #### HAVE_ALPN
 
@@ -1060,7 +1060,7 @@ Define for Curve448 support. Additional macro settings can be changed. The defau
 
 #### HAVE_DANE
 
-To verify Raw Public Key cert, DANE(RFC6698) add macro HAVE_DANE for dane authentification.
+This macro is a protocol that uses DNSSEC(domain lookup with crypto signatures) to allow certificates to be validated without depending certificate authority. This can provide a stronger garuntee of legitamicy. To verify Raw Public Key cert, DANE(RFC6698) add macro HAVE_DANE for DANE authentication.
 
 #### HAVE_DILITHIUM
 
@@ -1086,10 +1086,6 @@ Enables post-quantum crypto FALCON from OpenQuantumSafe.
 
 Used when implementing different FIPS versions.
 
-#### HAVE_FUZZER
-
-Used when implementing different F versions.
-
 #### HAVE_KEYING_MATERIAL
 
 Enables exporting keying material based on section 7.5 of RFC 8446.
@@ -1200,19 +1196,19 @@ Enables user-defined PSK cipher.
 
 #### WOLFSSL_OLD_PRIME_CHECK
 
-Enable feature which uses faster DH prime checking.
+Enable feature which uses faster DH and RSA prime checking.
 
 #### WOLFSSL_STATIC_RSA
 
 Static ciphers are strongly discouraged and should never be used if avoidable. However there are still legacy systems that ONLY support static cipher suites. To that end if you need to connect to a legacy peer only supporting static RSA cipher suites use this to enable support for static RSA in wolfSSL. (See also [`WOLFSSL_STATIC_PSK`](#wolfssl_static_psk) and [`WOLFSSL_STATIC_DH`](#wolfssl_static_dh))
 
 #### WOLFSSL_STATIC_PSK
 
-Static ciphers are highly discouraged see [`WOLFSSL_STATIC_RSA`](#wolfssl_static_rsa)
+Feature that enables static PSK cipher suites. Static ciphers are highly discouraged see [`WOLFSSL_STATIC_RSA`](#wolfssl_static_rsa)
 
 #### WOLFSSL_STATIC_DH
 
-Static ciphers are highly discouraged see [`WOLFSSL_STATIC_RSA`](#wolfssl_static_rsa)
+Feature that enables static ECDH cipher suites. Static ciphers are highly discouraged see [`WOLFSSL_STATIC_RSA`](#wolfssl_static_rsa)
 
 #### HAVE_NULL_CIPHER
 
@@ -1513,7 +1509,7 @@ Cleanup of the socket close code used, for example, CRL/OCSP and BIO, to use sin
 
 #### CONFIG_POSIX_API
 
-We need POSIX names for networking systems calls. This can either be enabled with CONFIG_NET_SOCKETS_POSIX_NAMES or with CONFIG_POSIX_API. This commit enables support for the latter."
+Enables POSIX names for networking systems calls.
 
 #### WOLFSSL_USER_CURRTIME
 
@@ -1531,21 +1527,13 @@ Identifies the minimum number of bits in ECCkey.
 
 Identifies the minimum number of bits in RSA key.
 
-#### EXIT_FAILURE
-
-Defined as 1 and is implemented to exit with a failure.
-
-#### EXIT_SUCCESS
-
-Defined as 0 but exits with success.
-
 #### EXTERNAL_SERIAL_SIZE
 
 A raw serial number byte that writes X509 serial numbers in unsigned binary to a buffer. For all cases, the buffer needs to be at least EXTERNAL_SERIAL_SIZE (32). On success, it returns WOLFSSL_SUCCESS.
 
 #### FIPS_VERSION_GE
 
-Define for use with FIPSv2.
+Define for use with general FIPS version comparisons.
 
 #### LARGE_STATIC_BUFFERS
 
@@ -2086,7 +2074,7 @@ Enable Single-Precision (SP) S390X assembly speedup macros. Only applies if `WOL
 
 #### SP_INT_BITS
 
-Single-Precision (SP) assembly speedup macro. Math configuration that can specify size.
+The number of bits to have in an sp_int. Which can determine the largest bignum that the library can handle.
 
 
 ### Stack or Chip Specific Defines