pidgin/pidgin

Rename gtkstyle.[ch] to pidginstyle.[ch] and fix up the dark mode check.

2020-11-10, Gary Kramlich
559881c7bf92
Rename gtkstyle.[ch] to pidginstyle.[ch] and fix up the dark mode check.

Testing Done:
* Ran with arc-dark and adwatia.
* Stepped through the debugger to make sure it was detected right.
* Joined a muc with both themes, the colors change but there're impossible to see as most of that code is elsewhere and not addressed in this review request.
* Also noticed that nicks in mucs are doubled, not sure what, but it's that way with out this patch as well.

Reviewed at https://reviews.imfreedom.org/r/208/
SILC Purple Plugin
==================
This is the Purple protocol plugin of the protocol called Secure Internet
Live Conferencing (SILC). The implementation will use the SILC Toolkit,
freely available from the http://silcnet.org/ site, for the actual SILC
protocol implementation.
To include SILC into Purple, one needs to first compile and install
the SILC Toolkit. It is done as follows:
./configure
make
make install
This will compile shared libraries of the SILC Toolkit. If the --prefix
is not given to ./configure, the binaries are installed into the
/usr/local/silc directory.
Once the Toolkit is installed one needs to tell Purple's ./configure
script where the SILC Toolkit is located. It is done as simply as:
./configure
if pkg-config is installed in your system. If it is isn't it's done as:
./configure --with-silc-libs=/path/to/silc/lib
--with-silc-includes=/path/to/silc/include
If the SILC Toolkit cannot be found then the SILC protocol plugin will
not be compiled.