Fix typos

Author: rex4539

doc/build-windows.md

@@ -133,7 +133,7 @@ Installation
 -------------
 
 After building using the Windows subsystem it can be useful to copy the compiled
-executables to a directory on the windows drive in the same directory structure
+executables to a directory on the Windows drive in the same directory structure
 as they appear in the release `.zip` archive. This can be done in the following
 way. This will install to `c:\workspace\bitcoin`, for example:
 

doc/developer-notes.md

@@ -705,10 +705,10 @@ Current subtrees include:
   - Upstream at https://github.com/google/leveldb ; Maintained by Google, but
     open important PRs to Core to avoid delay.
   - **Note**: Follow the instructions in [Upgrading LevelDB](#upgrading-leveldb) when
-    merging upstream changes to the leveldb subtree.
+    merging upstream changes to the LevelDB subtree.
 
 - src/libsecp256k1
-  - Upstream at https://github.com/bitcoin-core/secp256k1/ ; actively maintaned by Core contributors.
+  - Upstream at https://github.com/bitcoin-core/secp256k1/ ; actively maintained by Core contributors.
 
 - src/crypto/ctaes
   - Upstream at https://github.com/bitcoin-core/ctaes ; actively maintained by Core contributors.

doc/init.md

@@ -22,7 +22,7 @@ Configuration
 
 At a bare minimum, bitcoind requires that the rpcpassword setting be set
 when running as a daemon.  If the configuration file does not exist or this
-setting is not set, bitcoind will shutdown promptly after startup.
+setting is not set, bitcoind will shut down promptly after startup.
 
 This password does not have to be remembered or typed as it is mostly used
 as a fixed token that bitcoind and client programs read from the configuration