doc: Fix typos

Fix three typos.

Author: RoboSchmied

depends/packages/expat.mk

@@ -6,7 +6,7 @@ $(package)_sha256_hash=f79b8f904b749e3e0d20afeadecf8249c55b2e32d4ebb089ae378df47
 
 # -D_DEFAULT_SOURCE defines __USE_MISC, which exposes additional
 # definitions in endian.h, which are required for a working
-# endianess check in configure when building with -flto.
+# endianness check in configure when building with -flto.
 define $(package)_set_vars
   $(package)_config_opts=--disable-shared --without-docbook --without-tests --without-examples
   $(package)_config_opts += --disable-dependency-tracking --enable-option-checking

src/validation.cpp

@@ -5784,7 +5784,7 @@ bool ChainstateManager::PopulateAndValidateSnapshot(
     CBlockIndex* index = nullptr;
 
     // Don't make any modifications to the genesis block since it shouldn't be
-    // neccessary, and since the genesis block doesn't have normal flags like
+    // necessary, and since the genesis block doesn't have normal flags like
     // BLOCK_VALID_SCRIPTS set.
     constexpr int AFTER_GENESIS_START{1};
 

src/validation.h

@@ -275,7 +275,7 @@ MempoolAcceptResult AcceptToMemoryPool(Chainstate& active_chainstate, const CTra
 * Validate (and maybe submit) a package to the mempool. See doc/policy/packages.md for full details
 * on package validation rules.
 * @param[in]    test_accept         When true, run validation checks but don't submit to mempool.
-* @param[in]    client_maxfeerate    If exceeded by an individual transaction, rest of (sub)package evalution is aborted.
+* @param[in]    client_maxfeerate    If exceeded by an individual transaction, rest of (sub)package evaluation is aborted.
 *                                   Only for sanity checks against local submission of transactions.
 * @returns a PackageMempoolAcceptResult which includes a MempoolAcceptResult for each transaction.
 * If a transaction fails, validation will exit early and some results may be missing. It is also