KNOWN_BUGS: make a new section for cmake topics

Closes #6219

docs/KNOWN_BUGS

@@ -54,15 +54,11 @@ problems may have been fixed or changed somewhat since this was written!
  5.3 curl compiled on OSX 10.13 failed to run on OSX 10.10
  5.4 Build with statically built dependency
  5.5 can't handle Unicode arguments in non-Unicode builds on Windows
- 5.6 cmake: use correct SONAME for shared library
  5.7 Visual Studio project gaps
  5.8 configure finding libs in wrong directory
  5.9 Utilize Requires.private directives in libcurl.pc
  5.10 SMB tests fail with Python 2
  5.11 configure --with-gssapi with Heimdal is ignored on macOS
- 5.12 cmake: support build with GnuTLS
- 5.13 cmake: unusable tool_hugehelp.c with MinGW
- 5.14 cmake: build docs/curl.1
 
  6. Authentication
  6.1 NTLM authentication and unicode
@@ -112,7 +108,7 @@ problems may have been fixed or changed somewhat since this was written!
  11.11 A shared connection cache is not thread-safe
  11.12 'no_proxy' string-matches IPv6 numerical addresses
 
- 12. LDAP and OpenLDAP
+ 12. LDAP
  12.1 OpenLDAP hangs after returning results
  12.2 LDAP on Windows does authentication wrong?
  12.3 LDAP on Windows doesn't work
@@ -121,9 +117,15 @@ problems may have been fixed or changed somewhat since this was written!
  13. TCP/IP
  13.1 --interface for ipv6 binds to unusable IP address
 
- 14 DICT
+ 14. DICT
  14.1 DICT responses show the underlying protocol
 
+ 15. CMake
+ 15.1 use correct SONAME for shared library
+ 15.2 support build with GnuTLS
+ 15.3 unusable tool_hugehelp.c with MinGW
+ 15.4 build docs/curl.1
+
 ==============================================================================
 
 1. HTTP
@@ -428,13 +430,6 @@ problems may have been fixed or changed somewhat since this was written!
   https://curl.se/bug/?i=731
   https://curl.se/bug/?i=3747
 
-5.6 cmake: use correct SONAME for shared library
-
- The autotools build sets the SONAME properly according to VERSIONINFO in
- lib/Makefile.am and so should cmake to make comparable build.
-
- See https://github.com/curl/curl/pull/5935
-
 5.7 Visual Studio project gaps
 
  The Visual Studio projects lack some features that the autoconf and nmake
@@ -482,18 +477,6 @@ problems may have been fixed or changed somewhat since this was written!
 
  https://github.com/curl/curl/issues/3841
 
-5.12 cmake: support build with GnuTLS
-
-5.13 cmake: unusable tool_hugehelp.c with MinGW
-
- see https://github.com/curl/curl/issues/3125
-
-5.14 cmake: build docs/curl.1
-
- The cmake build doesn't create the docs/curl.1 file and therefor must rely on
- it being there already. This makes the --manual option not work and test
- cases like 1139 can't function.
-
 6. Authentication
 
 6.1 NTLM authentication and unicode
@@ -796,7 +779,7 @@ problems may have been fixed or changed somewhat since this was written!
 
  See https://github.com/curl/curl/issues/5745
 
-12. LDAP and OpenLDAP
+12. LDAP
 
 12.1 OpenLDAP hangs after returning results
 
@@ -850,3 +833,24 @@ problems may have been fixed or changed somewhat since this was written!
  from the output.
 
  https://github.com/curl/curl/issues/1809
+
+15. CMake
+
+15.1 use correct SONAME for shared library
+
+ The autotools build sets the SONAME properly according to VERSIONINFO in
+ lib/Makefile.am and so should cmake to make comparable build.
+
+ See https://github.com/curl/curl/pull/5935
+
+15.2 support build with GnuTLS
+
+15.3 unusable tool_hugehelp.c with MinGW
+
+ see https://github.com/curl/curl/issues/3125
+
+15.4 build docs/curl.1
+
+ The cmake build doesn't create the docs/curl.1 file and therefor must rely on
+ it being there already. This makes the --manual option not work and test
+ cases like 1139 can't function.