docs: spelling nits

- MingW -> MinGW (Minimalist GNU for Windows)
- f.e. -> e.g.
- some whitespace and punctuation.

Reviewed-by: Daniel Stenberg

Closes #9622

lib/Makefile.m32

@@ -24,14 +24,14 @@
 
 ###########################################################################
 #
-## Makefile for building libcurl.a with MingW (GCC-3.2 or later or LLVM/Clang)
+## Makefile for building libcurl.a with MinGW (GCC-3.2 or later or LLVM/Clang)
 ## and optionally OpenSSL (1.0.2a), libssh2 (1.5), zlib (1.2.8), librtmp (2.4),
 ## brotli (1.0.1), zstd (1.4.5)
 ##
 ## Usage:   mingw32-make -f Makefile.m32 CFG=-feature1[-feature2][-feature3][...]
 ## Example: mingw32-make -f Makefile.m32 CFG=-zlib-ssl-sspi-winidn
 ##
-## Hint: you can also set environment vars to control the build, f.e.:
+## Hint: you can also set environment vars to control the build, e.g.:
 ## set ZLIB_PATH=c:/zlib-1.2.8
 ## set ZLIB=1
 #

lib/curl_setup.h

@@ -742,12 +742,12 @@
 #define SHUT_RDWR 0x02
 #endif
 
-/* Define S_ISREG if not defined by system headers, f.e. MSVC */
+/* Define S_ISREG if not defined by system headers, e.g. MSVC */
 #if !defined(S_ISREG) && defined(S_IFMT) && defined(S_IFREG)
 #define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
 #endif
 
-/* Define S_ISDIR if not defined by system headers, f.e. MSVC */
+/* Define S_ISDIR if not defined by system headers, e.g. MSVC */
 #if !defined(S_ISDIR) && defined(S_IFMT) && defined(S_IFDIR)
 #define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
 #endif

lib/urldata.h

@@ -580,7 +580,7 @@ struct Curl_async {
   struct Curl_dns_entry *dns;
   struct thread_data *tdata;
   void *resolver; /* resolver state, if it is used in the URL state -
-                     ares_channel f.e. */
+                     ares_channel e.g. */
   int port;
   int status; /* if done is TRUE, this is the status from the callback */
   BIT(done);  /* set TRUE when the lookup is complete */

lib/vtls/schannel.c

@@ -108,7 +108,7 @@
 #define BCRYPT_SHA384_ALGORITHM L"SHA384"
 #endif
 
-/* Workaround broken compilers like MingW.
+/* Workaround broken compilers like MinGW.
    Return the number of elements in a statically sized array.
 */
 #ifndef ARRAYSIZE