.gitignore: a bit more structure; inspired by https://github.com/github/gitignore

Origin commit data
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Branch: master
Commit: 68821bd25e
Author: vanhofen <vanhofen@gmx.de>
Date: 2019-04-24 (Wed, 24 Apr 2019)

Origin message was:
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- .gitignore: a bit more structure; inspired by https://github.com/github/gitignore

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No further description and justification available within origin commit message!

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This commit was generated by Migit

.gitignore

@@ -1,27 +1,68 @@
-/aclocal.m4
-/autom4te.cache/
+### http://www.gnu.org/software/automake
+Makefile
 Makefile.in
+
+### http://www.gnu.org/software/autoconf
+autom4te.cache
+/autoscan.log
+/autoscan-*.log
+/aclocal.m4
 /compile
 /config.guess
 /config.h.in
+/config.log
+/config.status
 /config.sub
-*/*-config.h
-*/*-config.h.in
 /configure
-*.directory
+/configure.scan
 /depcomp
 /install-sh
-/ltmain.sh
-/m4/
 /missing
-*.*~
-*.a
-*.la
-*.lai
+/stamp-h*
+
+### https://www.gnu.org/software/libtool/
+/libtool
+/ltmain.sh
+
+### http://www.gnu.org/software/m4/
+m4/libtool.m4
+m4/ltoptions.m4
+m4/ltsugar.m4
+m4/ltversion.m4
+m4/lt~obsolete.m4
+
+### compiled objects and libs
+.libs
 *.lo
 *.o
+*.so
+*.lai
+*.la
+*.a
+
+### dependency files
+.deps
 *.Plo
 *.Po
 
+### diff and patch files
+*.patch
+*.diff
+*.orig
+*.rej
+
+### system generated stuff
+# dolphin
+.directory
+# kate
+*-swp
+.*.swp
+
+### generally excluded files
+*~
+*.pc
 git-*
 go_*
+
+### header files that fall out of the build
+libstb-hal-config.h